Fossilised turritella gastropod shells

This is my haul of fossils from my trip to Bracklesham Bay on Sunday. Sometimes there are quite big ones lying on the beach but this week the largest was only about 25 mm long, although they were plentiful. Other times I have been to Bracklesham the predominant fossils were the bivalve shells but there were only broken bits of these this time. I am still looking for the elusive fossilised sharks' teeth which can, apparently, be found at Bracklesham but not, so far, by me. Of course that gives me a reason to go back...