What Is It ??

Can anyone help? I can't identify this plant growing on a stoney strand. I ended up cooking for 8 today...nice meal but a lot of work. Managed a jaunt to the beach. We collected some seaweed and shell sand- just to justify the visit. was beautiful.
Had a bit of a row with Aedan about not cleaning out his pigs and not giving them clean water..he's sorted it all now and moved them all around. The ones that went out again were rolling in the mud for joy!