Some details of the sinking of LST 420 are contained in "Ships Without Names" by Brian Macdermott ISBN 1-85409-126-3 published by Cassell 1992. My father was on LST 367 which drifted between the two halves of 420 and picked up some survivors - this was either brave or stupid by the skipper of 367 (Lt Comm Page) since this was in a howling gale and in the middle of a minefield !