List of World War II prisoner-of-war camps in the United Kingdom

This is an incomplete list of Prisoner of War (POW) Camps located in the United Kingdom during World War II.
German POWs in England were graded as follows: "Grade A were considered anti-Nazi; Grade B had less clear feelings and were considered not as reliable as the 'whites'; Grade C had probable Nazi leanings; Grade C+ were deemed ardent Nazis."
Some camps were classed as General Processing Camps.
There was a large amount of renaming, renumbering and reuse of camp numbers during World War II. The reason for this is unknown but speculation has it that it was to confuse the Axis powers in the event of any attempted breakouts after any potential Paratrooper attack or invasion. Examples:
No. 286 Purfleet Camp, Beacon Hill, Purfleet, Essex
No. 654 Purfleet Camp, No.4 Transit Camp, Beacon Hill, Purfleet, Essex
No. 655 Purfleet Camp, No.1 Transit Camp, Beacon Hill, Purfleet, Essex