No. 3 Group (3 Gp) of the Royal Air Force was an RAF group first active in 1918, again in 1923–26, part of RAF Bomber Command from 1936 to 1967, and part of RAF Strike Command from 2000 until it disbanded on 1 April 2006. No. 3 Group was first formed on 10 May 1918 as part of South-Eastern Area. No. 13 Group RAF was merged into 3 Group on 18 October 1919. Group Captain U J D Bourke took command on 30 November 1919. The Group was disbanded on 31 August 1921. The 1930s and the Second World War Reformed in 1923, 3 Group was disbanded on 12 April 1926 at RAF Spitalgate by renumbering it No. 23 (Training) Group. The Group was reformed at Andover, Wiltshire on 1 May 1936, under Air Vice-Marshal Patrick Playfair. Ten months later Group HQ moved to RAF Mildenhall in Suffolk, a direct result of the Air Ministry's decision to form two new bomber groups and reorganise its existing groups. No. 3 Group was initially equipped with the ungainly Vickers Virginia and Handley Page Heyford, which was the RAF's last biplane heavy bomber. With the arrival of the then revolutionary twin engined Vickers Wellington it was decided that No. 3 Group would be tasked with introducing the type into front line service. The first squadron in Bomber Command to be equipped was No. 99 Squadron RAF based at Mildenhall, on 10 October 1938. Air Commodore A A B Thomson, Playfair's successor, was killed on 8 August 1939 while viewing the bombing up of a Vickers Wellington of No. 115 Squadron RAF. While under the fuselage, he slipped and was struck on the head by the rotating airscrew. Air Vice-Marshal J E A Baldwin took over the Group on 29 August 1939. By September 1939 the entire group (totalling six front line squadrons and two reserve squadrons) was fully equipped with an all-Wellington force totalling over 100 aircraft located at five East Anglian airfields. 3 Group continued to be primarily based in East Anglia for the rest of WWII. 3 Group's first wartime operations were attacks against German warships at Wilhelmshaven and Brunsbüttel. Group HQ moved to Harraton House, Exning, Suffolk, in March 1940. On 2 April 1940, two squadrons were temporarily transferred to RAF Coastal Command and advanced bases in Northern Scotland, and they had hardly settled in before the Germans invaded Denmark