At 0022 hours on 21 Sepember 1943 the German U-952 fired a Gnat at an escort of the convoy ON-202 and heard after three minutes a detonation, followed by sinking noises. HMS Polyanthus (Lt. John Gordon Aitken, RNR) was hit and sank immediately at position 57º00'N, 31º10'W. The British frigate HMS Itchen picked up one survivor, but he died when the frigate was torpedoed and sunk two days later by U-666.

Commanding Officers:
Lt. Arthur Hague, RNR
??? – 25 June 1942

Lt.Cdr. Raymond Spurr Holland, RNR
25 June 1942 – 8 January 1943

T/Lt. John Gordon Aitken, RNR
8 January 1943 - 21 September 1943+ 

Hit by U-boat
Sunk on 21 Sep, 1943 by U-952 (Curio).