No. 577 Squadron RAFNo. 577 Squadron was an anti-aircraft co-operation unit of the Royal Air Force formed during World War II and active from December 1943 till June 1946 in the defence of the Midlands.History577 squadron was formed on 1 December 1943 at RAF Castle Bromwich from elements of nos.6, 7 and 8 anti-aircraft cooperation units. It operated a varied lot of aircraft on airfields and bases all over the Midlands and Wales. On 15 June 1946 the squadron disbanded at Castle Bromwich.