Royal Navy Fleet Flagship
In the Royal Navy, the fleet flagship is, in practice, the warship designated as the fleet's most prestigious vessel, currently.
In the modern era, the fleet flagship has usually been an aircraft carrier, but that changed in 2010 with the assignment of. The flag was transferred to in 2011 and in June 2015, then to in 2018. Finally, the flag reverted to an aircraft carrier when took up her position in January 2021. The position was rotated to on the 2 December 2024.
Flagships in the Royal Navy
Technically, the fleet flagship would be the ship that would host the two-star maritime battlestaff headquarters for operations.Generally, a flagship is a ship in which an Admiral flies his flag. As, in the Royal Navy, shore establishments can be commissioned as warships, the term can also indicate that of shore establishments run by senior Royal Naval commanders. For example, in 1960, the Commanders-in-Chief of the Home Fleet and its successors the Western Fleet, and Commander-in-Chief Fleet, flew their flags ashore in HMS Warrior in Northwood, before the downgraded three-star Fleet Commander moved to Portsmouth in 2005. Since then the Fleet Commander has flown his flag from these headquarters at the shore establishment. In addition, the First Sea Lord flies his flag in , and she is thus referred to as the 'First Sea Lord's Flagship'.
"National Flagship"
In 2021 the UK Government announced plans for a new "national flagship" crewed and run by the Royal Navy that despite this designation would not be a command ship but a replacement for the Royal Yacht Britannia. The plans were abandoned in November 2022.Historic flagships
| Ship | Dates |
| Elizabeth Bonaventure / Bonaventure | 1567–1626 |
| Ark Royal / Anne Royal | 1587–1636 |
| Naseby / HMS Royal Charles | 1655–1667 |
| 1914–1917 | |
| 1917–1919 |
Modern fleet flagships
| Ship | Dates |
| 1993–2005 | |
| 2005–2007 | |
| 2007–2009 | |
| 2009 – 13 December 2010 | |
| 13 December 2010 – 11 October 2011 | |
| 11 October 2011 – 1 June 2015 | |
| 1 June 2015 – 27 March 2018 | |
| 27 March 2018 - 27 January 2021 | |
| 27 January 2021 - 2 December 2024 | |
| 2 December 2024 - to date |