Sandra, thank you so much, but please do so it only if you have time, I shall feel so guilty now if you don't find anything and have a wasted journey.
I will send for his wife's death certificate too as that will confirm he had died before 1948 - I hadn't thought of doing that before, would have made sense really!
The story I have heard is that he was drunk when he fell into the harbour, which might have made it in to the paper, although if it was during the war there will have been more important news. I have no idea which harbour or even which channel island it was, so not much to go on.
Thanks for all your help,
Daff