No. 35 Squadron was formed on 1 February 1916 at Thetford, training as a Corps reconnaissance squadron. In January 1917 the squadron moved to France, equipped with the Armstrong Whitworth F.K.8, beginning operations during the Battle of Arras, working alongside the Cavalry Corps, throughout 1917. It re-equipped with Bristol Fighters in the later part of 1918, before returning to RAF Netheravon in March 1919 and then disbanding on 26 June 1919.
On the outbreak of World War II, No. 35 Squadron was designated a training unit, supplementing its Battles with Avro Ansons and Bristol Blenheims late in 1939. The squadron disbanded after being absorbed into No. 17 OTU along with No. 90 Squadron at RAF Upwood, on 8 April 1940. The squadron reformed on 5 November 1940 at RAF Linton-on-Ouse in Yorkshire as the first Handley Page Halifax squadron. In August 1942 it was one of the five squadrons selected to create the Pathfinder Force. The squadron was based at RAF Graveley. When the Pathfinder Force was enlarged 35 Squadron was a part of the newly designated No. 8 Group. In March 1944 the squadron converted to the Avro Lancaster, which it used till the end of the war.
Postwar
In 1946, in addition to participating in the Victory flypast over London the squadron participated in a goodwill tour of the United States, later returning to RAF Stradishall, due to Graveley's closure. The Lancasters were replaced by Avro Lincolns in September 1949, and the squadron later disbanded on 23 February 1950. On 1 September 1951 the squadron reformed at Marham equipped with the Boeing Washington. In April 1954 the squadron re-equipped with its first jet powered aircraft type, the Canberra B.2 twin engined light bomber. The squadron again disbanded on 11 September 1961. No. 35 Squadron reformed for the last time on 1 December 1962 at RAF Coningsby as part of RAF Bomber Command's V-bomber force, equipped with eight Vulcan B2 aircraft and Yellow Sun free-falling bombs in a high-altitude strategic bombing role, moving to RAF Cottesmore on 7 November 1964. When the WE.177B strategic bomb became available from mid-1966, eight were issued to No. 35 Squadron at Cottesmore. These laydown bombs were specifically designed for the low-level penetration role, did not require a pre-release 'pop-up' manoeuvre, and improved the survivability of the squadron's Vulcans. Following the transfer of responsibility for the nuclear deterrent to the Royal Navy the squadron joined the Near EastStrike Force at RAF Akrotiri, Cyprus, still equipped with eight Vulcan B2s and eight WE.177 nuclear weapons and a variety of conventional weapons. The squadron remained at Akrotiri with 9 Squadron's similarly equipped Vulcans assigned as part of the UK contribution to CENTO the Central Treaty Organisation, for use in the low-level penetration role until the end of 1974, returning to RAF Scampton in January 1975 where the squadron disbanded for the last time on 1 March 1982.