The Squadron's activities at Debert reached their peak in June 1943. The next few weeks were filled with speculation and rumour about the future finally the cloak of mystery was raised with the announcement that No. 123 would go overseas as a unit at the end of November. While preparations for departure were at their height, a fire gutted part of the administration building. Despite this setback the Squadron got away on schedule and arrived in Britain in mid-December.

More of 439's air arsenal. Photo taken in Derbert, NS 27 Oct 1943. (Photo: 439 Sqn archives)