[RSwank]

I started to wade through the Ultra reports Nick mentions. Very interesting reading. Several mention the "Leda" and the convoy. The fourth escort ship was the R-195, so there were four escorts arranged in a square with the Leda in the center (as 38 squadron reports). The reports are not exactly in order and are mixed in with a lot of other messages, so you need to do a lot of digging to first find them, then do a little "rearranging" to get the exact sequence of events.

The 252 Squadron reports do record an attack on the escorts of the then burning Leda. When they arrived the Leda was already totally engulfed in flames so they carried out attack(s) on the escort ship(s). One attacker used rockets and another used cannons. Not clear if they attacked two different escorts or just one.