A roads in Zone 4 of the Great Britain numbering scheme

List of A roads in zone 4 in Great Britain starting north of the A4 and south/west of the A5.

Single- and double-digit roads

Road	From	To	Notes
	City of London	Avonmouth	Originally London to Bath
	City of London	Fishguard	The longest A road in Zone 4 at 256 miles long
	Central London	Birkenhead	A large section of the former A41, from Bicester to Solihull, was downgraded when the northern extension of the M40 motorway was opened, as was a section in Birmingham due to other road improvements; most of it is now the non-contiguous B4100. A41 rerouted along new dual carriageway, Black Country New Road, between West Bromwich and Wednesbury. Old route through Hill Top renumbered A4196.
	Kegworth	Appleby Magna	A continuation of the M42, hence the use of A42 despite being entirely in Zone 5. Previously allocated to a road from Reading to Birmingham; this became part of the A329, the A423, and the A34.
	M40 motorway Junction 10 north of Bicester	Stamford	Formerly continued along present route of B430.
	Oxford	Aberystwyth	Officially the most dangerous road in Wales between Aberystwyth and Llangurig. Route between Evesham and A422 originally designated A4538.
	Birmingham	Thrapston	Previously continued along route of current A14 to Felixstowe
	Bath	Cleethorpes	The section from Cheltenham to Heath End was mostly reclassified as B4632 and much of what was previously the A435 from Cheltenham to Bidford was renamed the A46. A piece of A438 from M5 J9 to Teddington also became part of the A46.
	Birmingham	Lowestoft	The original section between Birmingham and Nuneaton has mostly been now de-classified to B-roads, while the section between Nuneaton and Leicester via Hinckley has been largely de-trunked since the M69 runs a similar route. A12 from Great Yarmouth to Lowestoft redesignated as A47 in 2017.
	Highnam near Gloucester	Carmarthen	Originally began in Worcester. Worcester to Newport is now A449.
	Ross-on-Wye	Bamber Bridge

Triple-digit roads

Only roads that have individual articles have been linked in the "Road" column below.

Road	From	To	Notes
	Central London	Archway	Takes the route of the Northern line, Charing Cross Branch and High Barnet Branch
	Central London	Angel
	Central London	Stamford Brook, Chiswick
	M48 motorway, _{J1 near Aust}	Avonmouth	A road of the same number ran down Western Avenue, London until 1946 when the A40 was diverted along the route.
	Central London	A404 Junction 9B near Maidenhead	The London section is called Harrow Road for most of its length. Originally ran through Pinner, but now by-passes it using parts of the old A410 and A4090 and the old route through Pinner has now been declassified
	Leavesden Green	Near Park Street	Originally used from Gunnersbury Park to Wembley in West London. The section from Gunnersbury Park to Hanger Lane became part of the A406 North Circular Road when it opened and the route north to Sudbury Town became the A4005.
	Gunnersbury	Beckton	The North Circular Road
	Harlesden	Child's Hill	Through Willesden including the High Road and Cricklewood. Runs from the A598 to the A404. Originally used on a road from Hambrook to Downend. Now the A4174 and A4017.
	Heathrow Airport	Uxbridge	The southern section in Sipson due to be demolished to make way for Heathrow Airport 3rd runway
	Northwick Park Hospital	Bushey	through the middle of Wealdstone and the western part of Stanmore known as Stanmore Common
	Pinner	Edgware	Uxbridge Road, through Stanmore Broadway, then London Road and Spur Road meeting the A41. Original western section now part of A404
	Watford	Barnet	Meets the A41 twice between which it goes through the centre of Watford, Bushey Arches and Bushey Heath, then through the northern part of Elstree, across Stirling Corner through Arkley and into Barnet
	Slough	Garston	Was the main artery for this corridor and used to continue to St Albans prior to the construction of the M25. It provides interchange to the A4 in Slough, the A40/M40 at the Denham Roundabout, the M25 in Maple Cross, the A404 in Rickmansworth town centre, the A411 on a partially grade separated dual carriageway in Watford town centre, and the A41 in North Watford.
	Gerrards Cross	Towcester
	Near Hemel Hempstead	Maldon	Section from Hemel Hempstead to the Park Street Roundabout was the M10 before 2009.
	Berinsfield	Witney
	Amersham	Berkhamsted
	Streatley	Leominster
	M40 motorway _J8a	Ascott, Buckinghamshire
	Whitminster	Swindon
	Bristol	Oxford
	Croughton	Wyboston	Forms the H8 Standing Way in Milton Keynes.
	Bedford	Worcester	Concurrent with the A46 between Stratford-upon-Avon and Alcester. Forms the H3 Monks Way in Milton Keynes.
	Hinksey Hill	Coventry	Formerly ran from Maidenhead to Tamworth via Oxford and Banbury and Coventry, and a small section of this remains as part of the Oxford Ring Road. Now begins its former route at Banbury. Section beyond Coventry now B4098 and A51.
	Burford	A44 near Bourton-on-the-Hill
	Daventry	Warwick	Route between the junctions with the A452 and the A46 previously part of A41.
	Leicester	Southam
	Market Harborough	Oundle
	Coventry	Cambridge	This road is now split in two parts between Great Barford and Eaton Socon due to the extension of the A421 to the A1.
	Chippenham	Coventry
	Quedgeley	Longford, Gloucester	Canal in Gloucester realigned in 2006 as part of A430 Western Relief Road construction. Originally used on a road between Chippenham and Bristol. Became a portion of an extended A420 in 1935.
	Bristol	Bath
	Bristol	Old Sodbury
	A46 at Dunkirk	A429 SW of Cirencester
	Unused		Used to run from the A429 near Malmesbury to the A38 near Hardwicke, south of Gloucester. Malmesbury–Nailsworth section now B4014; section north of Stroud became part of A419, now part of B4008.
	Birmingham	Cirencester	Concurrent with the A46 between Alcester and Teddington Hands
	A417 near Brockworth	A44 near Salford, Oxfordshire
	Harlington, London	A40 Western Avenue near Ickenham	Originally Gloucester to Newport; became a portion of a rerouted A48 in 1935.
	M5 motorway _{Junction 9}	A470 near Llanfilo
	Stratford-upon-Avon	A46 4 miles SW of Warwick
	Reserved		Reserved for Bristol Road. Used to run from Pershore to Great Malvern Downgraded in the 1960s, with the Pershore to Upton section becoming an extension of the A4104 and most of the reminder becoming the B4211. The westernmost section in Great Malvern itself remained Class I, becoming part of the A4532, but this was downgraded in the 2000s with the B4211 extended over it. Crossed River Severn on swingbridge in Upton-upon-Severn.
	Birmingham	Cookhill	Previously continued along present alignment of B4088.
	Droitwich	Whitchurch
	Worcester	Newnham Bridge
	Coventry	Burton upon Trent	Short gap in Coventry due to incomplete construction of Phoenix Way.
	Warwick	A45 at Ryton-on-Dunsmore
	Little Packington	Roughley
	Hinckley	Coalville	The original route through Hinckley was by-passed by a new road completed in the early 1990s
	Kidderminster	Studley, Warwickshire	The original route between Bromsgrove and Redditch was by-passed by a dual carriageway in the 1970s after Redditch was developed into a new town
	Newport	Stafford	Used to continue beyond M4. Route to M5 motorway previously A4538.
	Torton	West Hagley	Originally continued along present alignment of B4187.
	Stourbridge	Great Witley
	Leamington Spa	Brownhills	Known as Chester Road for most of route between A5 and M42. Link road between A425 and M40 J14 previously A41.
	Nottingham	Birmingham	Concurrent with A5127 in Sutton Coldfield. Part of old route reinstated as A453 to serve East Midlands Airport.
	Bridgnorth	Four Oaks	The section through Willenhall was renumbered in the 1970s following the completion of The Keyway by-passing the south of the town, and further renumbering took place in 1995 on the completion of the Black Country Route. Used to continue direct to Bridgnorth town centre. Rerouted along new alignment to meet A458 near Stanmore when bypass opened.
	Unused		First used from Birmingham to Stafford until 1935 when it became part of a northern extension of the A34. Next used from M4 J24 in Ringland, Newport to George Street Bridge. Became part of the A48 Southern Distributor Road in 2004 and the rest is now Corporation Road.
	Birmingham	Woofferton	The section through Halesowen was renumbered to B4183 and A458 when the by-pass opened in the 1960s. Originally started on A41 in city centre, it later started on the Inner Ring Road but now starts on the Middle Ring Road.
	Birmingham	Sedgley	The original route through Smethwick town centre was renumbered when a by-pass opened in about 1970. Also used to pass through Oldbury town centre. Has two branches in Sedgley: Tipton Road and Gate Street.
	Mallwyd	Quinton	Originally started in Cross Foxes Inn. Further renumberings have taken place over the years, notably when the town of Bridgnorth was by-passed in 1985, and when the western section became part of the A470. Section between Halesowen and Quinton previously A456.
	Halesowen	Wolverhampton	Renumbering took place when Dudley town centre was by-passed by a new route of the A461 in 1999. The road continued south of Halesowen towards Bromsgrove until the 1970s. Also used to meet Ring Road in Wolverhampton but now terminates at A4123, Grove Street. Until the 1960s ran down Dudley Street in Wolverhampton. After this road was pedestrianised, followed route of B4158, B4160 and part of A460 via Garrick Street, Market Street, Princess Street and Stafford Street to Five Ways. However Stafford Street was taken over by the A449 when old A449, Waterloo Road, declassified in 1980s.
	Wolverhampton	Rugeley	The section through the centre of Cannock was renumbered A4601 in 1989 when the town's by-pass opened. Currently only link to M6 North from M54 Junction 1. Originally terminated in Princes Square in Wolverhampton.
	Lichfield	Wollaston, West Midlands	Concurrent with the A41 between Wednesbury & Great Bridge. Previously passed through Brierley Hill town centre. Old route through Dudley town centre renumbered or declassified when bypass opened in 1999. In 2008, the bypass was named Duncan Edwards Way.
	Essington	Wednesbury	The section through Darlaston town centre became unclassified when a new by-pass opened in the late 1960s
	Wombourne	Willenhall	The section beyond Coseley was either renumbered or became unclassified when the Black Country Route was completed between 1986 and 1995. Part of former route in Bilston replaced by A4039 and B4484. Concurrent with A454 between The Keyway and Armstrong Way.
	Oaken	Hollinswood	Primary route between Wolverhampton and Telford for non-motorway vehicles via Albrighton and Shifnal Originally used between Oaken and Nantwich. Renumbered to A41 from Oaken to Hinstock and A529 from there to Nantwich in 1935.
	Bromyard	M4 motorway Junction 45, Llandarcy
	King's Thorn	Chepstow
	Duffryn, Newport	A465, Brynmawr
	Bassaleg, Newport	A470, Nantgarw
	A4161, Roath, Cardiff	A465, Rhymney
	Cardiff	Llandudno	Original north end was at Brecon. Later extended north.
	Unused		Ran from Abergavenny to Usk. In 1935 the section from Abergavenny to Llanvihangel Gobion became part of a rerouted A40 and the remainder was downgraded to the B4598 in the 1970s.
	Treharris	Usk
	Pontypridd	Bridgend	Originally started at Treforest but following the completion of the Church Village bypass it now starts at Upper Boat and the section between Treforest and Gwaun Meisgyn is now downgraded to the B4595.
	Briton Ferry	Ammanford
	Newcastle Emlyn	Lampeter	Originally used from Swansea to Carmarthen. Much of the route became part of a rerouted A48 and the southern section between Swansea and Penllergaer became part of the A483 in 1935.
	Llanelli	Llandeilo
	St Clears	Johnston
	Cardigan	Tenby
	Glanusk	Llyswen	Runs through the heart of the Brecon Beacons in Wales. Originally went northwest to Rhayader, but this section became part of the A470. Another A479 runs along Empire Way, Wembley ; this was formerly B4565 until 2007.
	A44 at Lyonshall	A438 west of Hereford
	Somewhere near Llanfihangel, Llandegley	Llanelwedd
	Aberaeron	Llanwrda
	Swansea	Chester	by way of Wrexham. Becomes A5 road in the vicinity of Oswestry.
	Cardigan	Cadle near Swansea	by way of Newcastle Emlyn, Carmarthen and Llanelli
	Tanerdy	Llanfarian
	New Quay	A484 near Saron
	Haverfordwest	Bangor
	Penybont	Shrewsbury
	Craven Arms	Machynlleth
	Churchstoke	Llanfyllin
	Lydiate Ash	Wall Heath	Used to terminate in Bromsgrove. Originally used between Shrewsbury and Cemmaes Road. Shrewsbury to Mallwyd became an extension of the A458 and the rest became part of a rerouted A4084 in 1935.
	Unused		Used to run from Llangurig to Newtown. Became a portion of an extended A470 while the 1935 extension into Newtown reverted back to the A489.
	Machynlleth	Dolgellau	The road is approximately 32 miles long and is next to the coast for the majority of the journey.
	Queensferry	Dolgellau	Extension to M56 motorway opened late 2008.
	A525 west of Whitchurch	A5 outside Oswestry	Previously met A483 closer to Oswestry, now truncated by Oswestry bypass.
	Llanelltyd	Blaenau Ffestiniog	Via Barmouth; originally went north to Llandudno.
	Porthmadog	Nefyn
	Pen-y-Gwryd	Porthmadog
	A487	Abersoch

Four-digit roads (40xx)

Four-digit roads (41xx)

Road	From	To	Notes
	Blackheath	Brierley Hill
	Kingswinford	Dudley	Section from Scotts Green Island to Dudley town centre previously A461. Between 1922 and 1925 this route was numbered B4177.
	Amblecote		Duplicate number. Amblecote A4102 is one way street running between A461 and A491. Between 1922 and 1925 the Amblecote road was numbered B4181.
	Merthyr Tydfil	Merthyr Tydfil	Duplicate number. Amblecote A4102 is one way street running between A461 and A491. Between 1922 and 1925 the Amblecote road was numbered B4181.
	Worcester	Hereford
	A449 in Little Malvern	A44 Pershore	Upton-upon-Severn to Pershore originally part of A440. The section heading north from Pershore town centre was previously part of the B4082.
			The original A4105 is now the B4218 in Malvern but was originally the B4217. A later A4105 formed a short link between the A49 and A456 in Brimfield Herefordshire, having previously been upgraded from unclassified to the B4528. Classified to A road status in 1971, it was declassified a few years later when the Brimfield bypass opened.
	Bridgend	Porthcawl
	Bwlch y Clawdd	Port Talbot
			First used in the mid-1920s from Cymer to Glyncorrwg when the B4185 was upgraded to Class I status. This became an extension of the A4063 in 1935 when the A4107 replaced the A4063 west of Cymer and has since been declassified. The second A4108 ran from Gelilydan to Congl-y-wal, created around 1947 when the B4408 was upgraded to Class I status. Later became part of the A470 to create a north–south cross-country route through Wales.
	Aberdulais	Glynneath
	Leintwardine	Hereford
	Near Whitney-on-Wye	Kington
	Tenbury Wells	Eardisley
	Bromfield	Knighton
	Allesley	Willenhall	Previously part of the A45 before it was re-routed to run south of Coventry. Originally ran from Bladon Road to Oxford Road in Woodstock; this was part of the B4024 before it was upgraded in 1922. Became a spur of the A4095 in 1935 and was declassified by the 1950s.
	Templeton	Cross Hands	Was B4315 until 1935. Originally ran from Aberaeton to Lampeter; this was previously the B4340 before it was upgraded in the mid-1920s. Became part of a rerouted A482 in 1935.
			This was used for the original route of the A40 in Carmarthen when the Inner Relief Road opened and the A40 was rerouted along Morfa Lane. Due to the narrowness of the old A40 route, the A4116 was later declassified. First used between Stroud and Cirencester, designated in the mid-1920s when the B4069 was upgraded. Became part of a rerouted A419 in 1935.
	Near Bewdley	Ludlow	Passes Titterstone Clee Hill at 381 metres above sea level.
	Dyfatty Street, Swansea	Port Eynon
	Tonypandy	Cardiff Bay	Originally began at Llwynypia but following the completion of the Porth Relief road the road became part of the A4058 Treorchy to Pontypridd route.
	Llanbadarn Fawr, Aberystwyth	Ponterwyd	It runs parallel with the A44, but on the other side of the Rheidol Valley.
			This was used for a short road in Wednesbury which ran along High Bullen from the A461 High Street to the A462 Upper High Street. It was classified in 1926 and was declassified some time later, possibly when the A461 was rerouted although this is uncertain.
			Cut the corner between the A425 and A423 south of Southam, designated in 1927. Unlike other short link roads, the A4122 did not become a spur in 1935, but kept its number. Now part of the A425 itself.
	Wolverhampton	Harborne, Birmingham	The road continued from the current terminus in Harborne to the A441 just north of Kings Norton along the current route of the A4040 from the 1930s to the 1960s. Named Birmingham New Road at one end, New Birmingham Road in the middleand Wolverhampton Road at the other end. Built 1924–1927 as part of a job creation scheme. Opened by Edward, Prince of Wales
	Wolverhampton	Brownhills	Wednesfield town centre bypassed in 2000s. Former route between Wood End Road and Wednesfield High School renumbered B4484. The A4124 ran only between Wolverhampton and Bloxwich from 1928 to the 1980s but the entire route was originally numbered B4155.
	Northwood	Bushey	Originally ran from Little Mill to Abergavenny; this was the B4245 until the late 1920s. Renumbered as a northern extension of the A4042 in 1935.
	Monmore Green	Coseley	Called Rookery Road between A4123 and A463. Not signposted off A463.
	Heston	Wembley
	High Wycombe	Great Missenden
	Princes Risborough	Thame
	Burchetts Green	Rowstock	The section of road between Milton Hill and Rowstock was formerly part of the A34.
			Previously the road from the A47 at Camp Hill near Nuneaton to the original A5 in Atherstone. Now partly the B4111 and declassified.
			Previously only identified from DfT lists, but is now known to have linked the A472 and A469 at Ystrad Mynach. The eastern terminus differs depending on maps, but it followed Lewis Street east from the A472 and ran along either Bedwlwyn Street or Penalltau Road to the A469. Decommissioned, probably due to completion of the new eastern bypass of Ystrad Mynach.
	Great Witley	Droitwich Spa
			Ran from the A439 in Evesham Place to the A34 in Stratford-upon-Avon; was the B4534 before it was upgraded to Class I status in the 1970s. Now the northern portion of the A4390.
	Tetbury	Slimbridge	The road was originally numbered B4066 and ended on the A38 in Cambridge, Gloucestershire. It was upgraded to A-road status around 1930. During construction of the M5 motorway, the road was rerouted to its present terminus in Slimbridge.
	Huntley, Gloucestershire	Monmouth	Both ends link to A40 – goes through Forest of Dean
	Whitchurch	Harewood, Herefordshire
	Pontardulais	Llanelli
	Tenby	Pembroke Dock
	Wembley	Bushey Heath	Salmon Street, Fryent Way, Honeypot Lane, Marsh Lane. North of Stanmore Broadway as Stanmore Hill and The Common.
	Solihull	A4177 at Five Ways, Warwickshire	Previously part of A41; section renumbered when an extension of the M40 motorway opened. The southern end of the road lies midway between Knowle and Warwick. Originally the southwestern portion of the Oxford Ring Road, from Botley to South Hinksey. Extended along the old A40 in the 1930s when it was moved to the Oxford northern bypass. The bypass was extended north around 1960, allowing the A34 to take over the southern extension of the A4141. The remainder later became the B4044.
	Heyford Hill, Oxford	Headington	Part of the Oxford Ring Road
	Llanfoist	Abergavenny
	Pear Tree, Oxford	Redbridge Park and Ride
	Watford	Rickmansworth
	Milton Keynes	Hemel Hempstead	Section between Leighton Buzzard and Hemel Hempstead downgraded to B440 in 2017. Only a small stretch connecting the A414 and A4251 remains as the A4146 in Hemel Hempstead. Forms much of H10 Bletcham Way, V11 Tongwell Street and a small portion of H6 Childs Way in Milton Keynes.
	Hemel Hempstead	St Albans
	Bescot	Bescot	Walsall Ring Road

			Wolverhampton Ring Road Originally the northern section of the Gloucester Ring Road. Later switched to a section of leftover A40 in the center of Gloucester ; became a portion of the A417 by 1946 and is now unclassified and partially pedestrianized.
	A48 at Elton, Gloucestershire	A4136 at Nailbridge	Through the Forest of Dean, main town on this road is Cinderford
			Ran from the A40 to the A4149 in Ross-on-Wye; now declassified, possibly when all Class I roads were removed from the town center following completion of the A40 eastern bypass.
			Ran from the A438 on the River Wye to the A438 just north of the Whitney Bridge; originally the B4350. Now part of a rerouted A438.
	Amersham	Amersham on the Hill	Originally ran from Ledbury to Ridgeway Cross; north of Ledbury was the southern end of the B4214 and the section from there via Bosbury to Westfield was the B4128. Downgraded by the 1970s; the B4214 got its section back while the remainder is now the B4220.
	Bourne End	Reading	By way of Little Marlow, Marlow, Medmenham, Henley-on-Thames, Lower Shiplake and Caversham
	Aylesbury	Aylesbury	Part of Oxford Road, connects A413 and A418.
	Aylesbury	Quarrendon	Aylesbury outer ring road
	Oxford	Iffley
	Bow Street, Aberystwyth	A44	Acts as a by-pass around the northern part of Aberystwyth.
	Newport Road, Cardiff	Llandough	Former A4055 and B4260. Number previously reserved in 1935 for upgrading the B489 to form a Swindon-East Anglia route with the A5160. But the tonnage was not enough to upgrade the road to Class I, so this proposal fell through and the route remains the B489.
	Ely Bridge, Cardiff	Southern Way, Cardiff	Runs along a part of the old A48.
	A4 at Sea Mills	A4018 at Westbury-on-Trym	Sylvan Way and Canford Lane
			Was reserved for Courtlands Drive in Watford, but this change was never implemented. Route now unclassified.
			Ran from the A4093 at Hendreforgan to the B4564 near Gilfach Goch. Now an extension of the B4564.
	Oxford	Kidlington	Banbury Road
			Ran from the A38 to the A456 in Birmingham. Originally numbered B4129.
	Highgate	Sparkbrook	Connects A41 to A4540/A435.
	Woodsetton	Dudley	Originally ran between West Bromwich and Smethwick; initially numbered as B4168 and was the A4031 briefly in the late 1970s before becoming the A4168. However the real A4168 is in Dudley, making this use a duplicate. In 2004 the route was correctly renumbered to A4252, although some signs on the roundabout and approaches still showed A4168 as of December 2017.
	Shifnal	Much Wenlock	The section immediately south of Shifnal was turnpiked in 1763 as one of a number of roads from Stafford and Newport, but leaves this turning sharply westwards, along a road formerly part of the Madeley turnpikes. It ends when reaches the present A442 road, but resumes a short distance further north, becoming a southern bypass for Telford. It then crosses Buildwas Bridge and runs to Much Wenlock.
			Ran from Coventry City Centre to Keresley Green Road, originally part of the A423 until 1973. Downgraded to a portion of the B4098 in the late 1980s.
	Cainscross	Badbrook
	Preston Cross	Trumpet
	Stroud	Gloucester
	Filton	Bedminster Down, Bristol	The Bristol or Avon Ring Road
	A4 / A4174 at Hicks Gate	Staple Hill	In two parts: Hick's Gate to A420 at Bridgeyate via Keynsham, and A4174 at Siston to Staple Hill
	A4 at Hotwells	A4018 at Blackboy Hill	Bridge Valley Road and Upper Belgrave Road, Bristol
	Meer End	Warwick	Section south of Five Ways previously part of A41; section renumbered when an extension of the M40 motorway opened.
	Oxhey Village	Watford
			Ran along Wembley Hill Road, Empire Way and Bridge Road in Wembley; originally part of the B4565 and A4089. The section along Bridge Road returned to the A4089 while the remainder became the A479 when the new Wembley Stadium opened in 2007.
	Yeading	Northwood	Starts at the White Hart Roundabout in Yeading at a junction with the A312. The section between this roundabout and the Polish War Memorial used to be the B455 but was "double-upgraded" to primary route status when the A312 Parkway bypass was built during the mid-1990s. Then becomes West End Road, High Street, Bury Street and Ducks Hill Road heading north towards the A404 Rickmansworth Road.
			Not shown on maps; only appears in the 2005 DfT Road List as running along Roebuck Lane in West Bromwich, formerly B4168. If the number was used, it was probably for a short time in the late 1960s as the route was split by the M5 in the early 1970s. The nearby A4252 now serves A4181's function.
	West Bromwich	West Bromwich
	Abingdon	Lodge Hill	Oxford Road, Abingdon. This road was formerly part of the A34. The remaining part of the road between Lodge Hill and Hinksey Hill near Oxford has since been unclassified.
	Evesham	Evesham
	Rowstock	Chilton	This road was formerly part of the A34.
~~A4186~~ - ~~A4188~~	Unused
	Redditch	Warwick
~~A4190~~ - ~~A4192~~	Unused
	A465 in Hereford	A438 in Hereford	Commercial Road; unsigned.
	Reserved		Reserved for the Hereford Southern Link Road from the A49/B4399 junction to the A465/B4349 junction. Modern maps erroneously show the number applying to the City Link Road, this is actually part of the A465.
~~A4195~~	Unused
	West Bromwich	Wednesbury	Formerly part of A41.
~~A4197~~	Unused
	Swindon	Swindon	Thamesdown Drive
~~A4199~~	Unused

Four-digit roads (42xx and higher)

Road	From	To	Notes
	Central London	Mornington Crescent, Camden
	Central London	Regent's Park
	Hyde Park Corner	Marble Arch	Part of the London Inner Ring Road
	Unused		Cut the corner between the A4 and A4202 in Hamilton Place. Became a portion of the A4202 by the 1940s; route is now unclassified due to dualling and realignment of Park Lane in the 1960s.
	Kensington	Notting Hill Gate	Kensington Church Street
	Edgware Road station	Bishops Bridge, Paddington
	Notting Hill Gate	Paddington Basin
	Westbourne Grove	Westbourne Park
	Ludgate Circus	Holborn Circus	St Bride Street is closed off to traffic and Stonecutter Street is exit only.
	Edgware Road station	Lancaster Gate
~~A4210~~	Unused
			Old route of A48 after the A48 Port Talbot Bypass was opened in the mid-1960s. Became the A48 again when the A48 was renumbered to M4 in the mid-1970s.
	Bala	Trawsfynydd
			Ran across northern Carmarthen. Upgraded from the B4207 in the late 1960s, but was downgraded to the B4312 after the Carmarthen bypass was built.
	Llanelli	Hendy	Inside this ring-road is the main commerce area of Llanelli, including the shopping centre, supermarket, indoor and outdoor markets, bus-station, high street shops as well as multi-story, off-street and street parking.
	Libanus	Defynnog
	Sketty	Gendros
	Swansea	Llansamlet
	Tenby	Tenby
	Scleddau	Manorowen
~~A4220~~	Unused
	Banwen	Abercraf
	Cowbridge	Talbot Green
	A4058 in Pontypridd	A470 in Pontypridd
			Ran from Abercynon to Aberdare. Formerly a portion of the A4059; downgraded to a section of the B4275 around 1990.
			Ran from Porth to Trehafod, was the A4058. Downgraded to a portion of the B4278, but although there is evidence the A4225 number may still exist, it may be no more than a mapping error, as the current reference to it is on Google Earth.
	Bonvilston	Cardiff Airport
~~A4227~~	Unused
			Described as a road in Pontypridd, but this is a typo for the A4223.
	Pyle	Porthcawl
	Llansamlet	Aberdulais
	Biglis	Pencoedtre
	M4 J30 Cardiff East	M4 J33 Cardiff West	Cardiff Link Road
	Tonyrefail	Aberdare
	Adam Street, Cardiff	Queensgate Roundabout, Cardiff	Central Link Road of the Peripheral Distribution Road
~~A4235~~ - ~~A4239~~	Unused
	Penllergaer	Loughor
	Port Talbot	Baglan	Port Talbot southern distributor road
	Carmarthen	Carmarthen
	Carmarthen	Carmarthen
	Brynrefail	Glasinfryn	Reclassified from parts of B4366 and B4547
~~A4245~~ - ~~A4250~~	Unused
	Kings Langley	Near Tring	Largely the old route of the A41
	West Bromwich	Smethwick	Part of the route was originally numbered B4168, A4168 and A4031. Renumbered A4252 in 2004 although as late as 2017 some signs showed A4168.
~~A4253~~	Unused
	Chilvers Coton	Horeston Grange	Nuneaton Eastern Relief Road
~~A4255~~	Unused
	Drayton	Daventry Reservoir
~~A4257~~ - ~~A4258~~	Unused
	Swindon	Wanborough
	Banbury	near Pear Tree, Oxford
~~A4261~~ - ~~A4272~~	Unused
			Listed as "Local Link in Coventry". Route is unknown.
~~A4274~~ - ~~A4279~~	Unused
	Bedford A428	Bedford A421	Largely the old route of the A428
	A4046 in Victoria, Ebbw Vale	Ebbw Vale East and Ebbw Vale West junctions	One section was formerly a portion of the A465.
~~A4282~~ - ~~A4288~~	Unused
	Swindon	Swindon
~~A4290~~ - ~~A4299~~	Unused
	Kettering	Kettering
	Gloucester	Gloucester
	Gloucester	Gloucester
	A5 near Cross in Hand	M1 J20	Lutterworth southern bypass; serves Magna Park distribution centre; dualled for entire length. Former portion of the A427.
	M1 J20	Market Harborough
~~A4305~~ - ~~A4310~~	Unused
	Swindon	Swindon
	Swindon	Swindon
	Swindon	Walcot
~~A4314~~ - ~~A4319~~	Unused
	Arno's Vale	M32 J3
~~A4321~~ - ~~A4360~~	Unused
	Beckhampton	Swindon	Renumbered from the A361 in the 1970s, with an extra digit to encourage traffic to avoid Swindon.
~~A4362~~ - ~~A4379~~	Unused
	A41 Park Road	Oxford Street	Designated in 2018, when Baker Street and Gloucester Place became two-way roads.
~~A4381~~ - ~~A4389~~	Unused
	A3400 Birmingham Road, Stratford-upon-Avon	A422 Banbury Road, Bridge Town	Former A4134.
~~A4391~~ - ~~A4399~~	Unused
	Lancaster Circus, Birmingham	Paradise Circus, Birmingham	Formerly used for the entire Birmingham Inner Ring Road, this is the designation for the ground level road where the A38 runs through tunnels. The western section is now the A38, the eastern section now B4100 and the remainder demolished.
~~A4401~~ - ~~A4419~~	Unused
	Hoobrook	Birchen Coppice	Silverwood Way
	Bicester	Finmere
~~A4422~~ - ~~A4439~~	Unused
	Worcester	Worcester
~~A4441~~ - ~~A4443~~	Unused
	Bilston	Moxley	Black Country New Road. Connects A463 and A41. Runs parallel to Walsall Canal.
~~A4445~~ - ~~A4499~~	Unused
	Northampton	Wellingborough	Formerly A45. Runs from M1 junction 16 to A509 Wellingborough ring road
	Northampton	Northampton
~~A4502~~ - ~~A4507~~	Unused
	Unused		Ran from A45 south of Billing to Kingsthorpe. Renumbered to A5076 in the 2000s because the road was in zone 5.
~~A4509~~	Unused
	M54	i54 Business Park	Eastbound access to M54 or westbound access to i54 uses adjacent J2 slip roads.
~~A4511~~ - ~~A4531~~	Unused
			Ran from Malvern Link to Great Malvern; created in the 1960s when the A440 was decommissioned. The A4532 took over the westernmost section of the ex-A440 as well as the northernmost section of the B4208. Half of Pickersleigh Road returned to the B4208 and the remainder is now the B4211.
~~A4533~~ - ~~A4534~~	Unused
	Kidderminster	Kidderminster
	Fernhill Heath	A38
~~A4537~~	Unused
	Spetchley	Martin Hussingtree	Originally Evesham to Martin Hussingtree; former B4084. The route between Spetchley and Evesham became a portion of the A44 in 2004.
			Appears on OS Landranger maps running from the A442 to the Priorslee Roundabout at the then-A5, A464 and B5061 via the old M54 J5. The section between the A442 and M54 may have had the A4539 number with the remainder up to the A464 as part of the A5, but no further maps showing the number have been found.
	Birmingham Ring Road		The Middleway. The name stems from the road originally being designated as the Middle Ring Road. It is now the only one of Birmingham's Ring Road to be completely dual carriageway.
			Ran from Meole Brace to The Column, forming the start of the Shrewsbury eastern bypass. Renumbered to the A5112 except for a small section at the northern end that is now part of the A458. Whether or not the road was out-of-zone is debatable: while the road was on the wrong side of the A5 Shrewsbury bypass, it was on the correct side of the original A5.
~~A4542~~ - ~~A4544~~	Unused
	M42 J5A	Clock Interchange	This road opened in December 2024. Number chosen "because of its significance linking it with the A45 Clock Interchange which is part of the network already used by motorists"
~~A4546~~ - ~~A4599~~	Unused
	M69 J2	Coventry	Formerly part of the A46.
	Cannock	Cannock	Former route of A460.
	M54 J4	A518	Former B5060, renumbered in 2008.
			Shown in a 1975 AA Touring Guide town plan for Birmingham on Harborne Lane in Selly Oak as headed for the "Ring Road ". As Harborne Lane is part of the A4040, the "A4723" is probably a typo for the A4123.
			Ran from Piccadilly Circus to Charing Cross Road in London via Coventry Street.
	Newport SDR	M4 J23A	Classified A4810 in September 2013 when opened to the public
	Glendulais	Glen-Hafren	Former routing of A483 and A489 though Newtown. Designated in February 2019 when the Newtown bypass opened.
	Minffordd, Gwynedd	Porthmadog	Designated October 2011; formerly part of the A487.