HMS P 615 (Lt. Charles Walderne St Clair Lambert, DSC and Bar, RN) was sunk on 18 April 1943 about 100 nautical miles south-west of Freetown in position 06º49'N, 13º09'W by a torpedo from the German submarine U-123. All hands were lost.

Commanding Officers:
???

Lt. Peter Edward Newstead, RN
10 April 1942 – 17 October 1942

Lt. Charles Walderne St Clair Lambert, DSC and Bar, RN
17 October 1942 - 18 April 1943+ 

Hit by U-boat
Sunk on 18 Apr, 1943 by U-123 (Schroeter).