"Denbigh Castle", the only ship of her name to serve in the Royal Navy, was ordered on 19 December 1942 and laid down by John Lewis & Sons at their shipyard in Aberdeen, Scotland, on 30 September 1943. The ship was launched on 5 August 1944 and completed on 30 December 1944. She arrived at Tobermory, Mull, Scotland, on 12 January 1945 to begin training at the Royal Navy's Anti-Submarine Training School, HMS "Western Isles". Having completed training, "Denbigh Castle" arrived at Scapa Flow on 29 January to join the 7th Escort Group.