On 12 August 1941 Blenheim C/1404 of 1404 Meteorological Flight was credited with the sinking of a U-boat in Biscay. This account of the action comes from "Even the birds were walking" by John Kington and Peter Rackliff:

"In position 47.43N 10.15W the crew spotted a U-boat proceeding on the surface, probably making for Brest. Wykeham-Martin (the pilot) attacked the boat from astern with two A/S bombs as it executed a crash-dive. The bombs fell just ahead of the wake of the U-boat as it submerged. Walter Smith (one of the Blenheim's crew) observed the explosions and a few seconds later the boat's stern and a large section of the hull reared out of the sea, hung there for an instant, then slid back into the water. This was followed by a large dome-shaped eruption of bubbles, flotsam and oil. Finally, an irregular patch of oil, about 60 feet long was observed."

On the face of it the description appears quite conclusive but the only record of a U-boat loss in Biscay during the whole of 1941 was that of U-206 on 30 November.

I suspect the U-boat concerned might have been U-372, the only one in the location of the attack, but that reached Brest safely the following day. However, the history of U-372 ( [www.uboat.net]) makes no reference to this incident.

Any thoughts/advice please?

("Even the birds were walking" is a history of the RAF Meteorological Flights/Squadrons.)