10 iron cannon now remain visible, three of which lie on top of each other in this pile. Note the dense covering of fern like Bryozoans; Chartella papyracea and delicate white anemones Actinothoesphyrodeta.

The lengths of cannon around the site vary between 8 ft 6 in and 11ft 6in, two of which were recovered and drawn after treatment although their long term conservation proved unsuccessful.