On the beach at Mwnt this morning.
Unfortunately, this tablet is not good for close ups. They look like a whole bunch of earth worms with shell beaks.
I'd never seen any before, but it turns out they are Goose or Goose Neck Barnacles.
This is also interesting. I did not know this where the Barnacle Goose got it's name from. The long earth wormy bit supposedly looking like a goose's neck, it was assumed that this was how they were born.
Apologies if I am the only person in the world to have never seen or even heard of them before.