H.M.S. 'Glen Usk' does not appear to have played a role in the D-Day landings at Dunkirk since she for a time was in dry dock on the Tyne. In November 1942, however, she sailed to the Firth of Forth from the Thames to undertake anti-aircraft duties and played a part, together with H.M.S. 'Glen Avon', in the protection of the assembly points of the east coast convoys at Largo Bay situated on the coast of Fife in Scotland.

'H.M.S. 'Glen Usk' as an anti-aircraft ship in the North Sea during the winter of 1942 - 43.' [263] [313]