No. 657 Squadron RAF was a unit of the Royal Air Force in North Africa, Italy and the Netherlands during the Second World War and afterwards in Germany. Numbers 651 to 663 Squadrons of the RAF were Air Observation Post units working closely with British Army units in artillery spotting and liaison. Their duties and squadron numbers were transferred to the Army with the formation of the Army Air Corps on 1 September 1957.
No. 657 Squadron was formed at RAF Ouston on 31 January 1943. It went into action in August of that year, in North Africa. It later served in Italy, the Netherlands and Germany. In November 1945, the squadron returned to the UK and continued to support army units in the South of England until disbanded by being renumbered No. 651 Squadron RAF on 1 November 1955.
No. 1900 Independent Air Observation Post Flight was formed within 657 Squadron previously ‘A’ & ‘B’ Flights along with No. 1901 Air Observation Post Flight which was formed within 657 previously ‘C’ Flight.