Here’s the edited down version of the spectacular dive on some of the Valentine Tanks off the coast of Swanage, Dorset.

The footage includes the huge Conger Eel and the large shoal of Bib.

VALENTINE TANKS

These tanks sank whilst practising for the D Day landings in Normandy. In 1942 these experimental tanks were fitted with canvas screens which could be raised or lowered pneumatically to allow them to float in the sea.

They were powered by a drive system that enabled the engines to turn large propellers mounted at the rear when the tanks were in the water. Most of the experiments took place in Poole Bay but a few succumbed in rough sea conditions and sank.