Another one of those ships carrying stone blocks to London, maybe! There are a few about and for the most part, impossible to identify.
It was suggested that the steel mast may have washed up next to the blocks from the George B Balfour, as It's only about 800m away, as the ship transporting the blocks would undoubtably have been wood.
It's a dark and not very nice dive.
N50 42 675 E 00 10 416