The title of the pic with the U-Boat indicates 3 May 1945 - I believe Beaus attacked subs on that date, but not Mossies. If it's actually 2 May, that might be U-2359, which was sunk by the Banff wing on that date, another u-boat being damaged and an M-Class minesweeper left burning. I have know idea if the shape of the conning tower ir right for U-2359 however.
The other startling shot is the one with the Molins shell racing towards the ship - very rare pic. Another M-Class perhaps, though that's just a guess.