In January 1944 it re-equipped with the North American Mustang to operate long-range bomber escort duties and it also attacked targets in France and the Low Countries.

Within a few months the Mustangs were converted into fighter-bombers and the squadron started long-range ground-attack sorties into continental Europe.

Under the command of Squadron Leader Ernest Joyce, it was heavily involved in D-Day operations and within a few weeks had moved to France to support the invasion.

After three-months of intense operations the squadron was withdrawn to England and continued till the end of the war providing long-range escorts to both Bomber Command and the United States 8th Air Force.

After the end of the war the squadron was re-equipped with the Spitfire F21 but was disbanded at RAF Dalcross on 1 April 1946 when it was renumbered No.