Oh, what an unbearable waste that would have been, if so. And the information Ladyhawk found says that he had been mentioned in despatches, so he was not a coward.
The Guards War Diaries refer to the number of officers lost and the chaos and of someone having to be put temporarily in charge. We hear a lot about what happened on the beaches, what was going on behind them must, as you say, have been terrifying. Sobering to read even all these years later.