I think this is the first offer of an open cockpit biplane as used in the N Atlantic and Murmansk Runs in sub-zero conditions. From my researches for the
Aircrew feature in
Aeroplane magazine, may I present Fairey Swordfish relief tails?

Fairey Swordfish.
'I cannot recall how the Swordfish pilot spent a penny, but the procedure for the observer was to use an aluminium dust marker intended for use in wind-finding. These came in black cube-shaped tins, about six inches square and six inches high, and were probably quite expensive. The procedure was to remove the top of the tin, tip the aluminium dust over the side. fill the tin with the fluid in question, replace the top and then ditch the tin. When I first flew in an Albacore. I was delighted to find in the rear cockpit a tube. complete with a stainless steel funnel, which made the whole operation much more civilized.

Fairey Albacore - Charles E Brown, RAF Museum Collection.
'On this subject, I heard of an observer in a Swordfish who had to do a photographic exercise from Lee-on-Solent. On his return to base he was absolutely bursting, so he parked his service camera on the tailplane of the aircraft and beetled off to relieve himself behind a convenient hut. Meanwhile the photographic rating had spotted the camera, so he nipped out and took it inside to remove the film and develop it. The observer then returned and was horrified to find his camera missing. After searching everywhere he could think of, he finally assumed it had been stolen and sat down to write the requisite formal letter to the Captain — "Sir, I have the honour to report with regret the loss of a service camera. I was engaged in a service exercise, taking obliques in the vicinity of Brighton pier. with the lanyard attached to the camera securely around my neck, when suddenly without warning the lanyard snapped and the camera fell into the sea..."
'In due course the observer was summoned to appear before the Captain and, on entering the room, saw not only his letter but also the camera on the Captain's desk. Fortunately for him the Captain had a sense of humour and saw the funny side of the incident, so that he got of with nothing worse then a rocket.'
Anon.