The German invasion of Denmark and Norway in April 1940 led to an increase in operational activity at Kinloss and other Scottish airfields. As a result, No. 14 FTS moved south to RAF Cranfield in Bedfordshire on 20 April 1940. A detachment of No. 77 and No. 109 Squadron Whitleys from RAF Driffield returned the same month to undertake bombing missions in Norway, departing Kinloss in May.