Thankyou Barbara H for this link.
Although it doesn't mention my gr grandfather, I know he helped rescue some patients from that flood as he lived very near to it on the Quay, I did however actually know William Jackson! Obviously he was an old man into his 80's or even 9o's when I knew him from 1971 (and still working!) My husband was his apprentice .
He was known as Billy Jackson and was a Master Butcher/Slaughterman, and was delivering meat (tied to the crossbar of his bike) at the time of the floods to the 3 pubs that were then down on the Quay.
Billy never usually talked about this heroic act, but that info was imparted to us by Billy one night when we had met him in a pub along the Quay, when he had had a few bevvies.
He was a gracious old gentleman, who always wore a rose in his buttonhole and kissed a ladies hand when he met her.