According to the divers that dove on her in the early 70s, she was still intact.It was nothing to do with German u boats or WW2. In the very late 40,s or early 50,s a notice to fishermen was given to stay clear of the area as there was exercises been carried out. Explosions were heard and the British said later that a NATO exercise was carried out to test the theory that a Russia submarine could hide beside the wreck. They most likely dropped a few hedgehogs into the wreck.