No. 11 Group is a group in the Royal Air Force first formed in 1918. It had been formed and disbanded for various periods during the 20th century before disbanding in 1996 and reforming again in 2018. Its most famous service was in 1940 in the Battle of Britain during the Second World War, when it defended London and the south-east of the United Kingdom from attacks by the German Luftwaffe. It was reformed in late 2018 as a "multi-domain operations group" to ensure the service thinks and acts in a networked way. History First World War No. 11 Group was first formed on 1 April 1918 in No. 2 Area as No. 11 (Equipment) Group, and was transferred to South-Western Area the next month on 8 May. The Group was disbanded on 17 May 1918. Inter-war years The next incarnation of the Group occurred in 22 August 1918 when it was formed as part of the North-Western Area. On 6 February 1920, Group captain Ian Bonham-Carter took command and three months later, in May 1920, 11 Group was reduced in status to No. 11 Wing. The Group was reformed on 1 May 1936 as No. 11 (Fighter) Group by renaming Fighting Area. On 14 July 1936, 11 Group became the first RAF Fighter Command Group responsible for the air-defence of southern England, including London. Second World War, 1939 to 1945 No.11 Group was organised with the Dowding System of fighter control. Group Headquarters was at Hillingdon House, located at RAF Uxbridge in the London Borough of Hillingdon. The Group operations room was underground in what is now known as the Battle of Britain Bunker. Commands were passed to the sector airfields, each of which was in charge of several airfields and fighter squadrons. The sector airfields were: Sector A: RAF Tangmere (Sector HQ) RAF Westhampnett Sector B: RAF Kenley (Sector HQ) RAF Croydon RAF Redhill Sector C: RAF Biggin Hill (Sector HQ) RAF Hawkinge RAF Friston Sector D: RAF Hornchurch (Sector HQ) RAF Rochford RAF Manston Sector E: RAF North Weald (Sector HQ) RAF Stapleford Tawney Sector F: RAF Debden (Sector HQ) Sector Y: RAF Middle Wallop (Sector HQ) RAF Odiham Sector Z: RAF Northolt (Sector HQ) RAF Hendon Battle of Britain 1940 The most famous period of the Group was during the Battle of Britain when it bore the brunt of the German aerial assault. Pilots posted to