Sea Buckthorn

I was at Gullane Beach this morning, principally to draw attention to marine litter, specifically plastic cotton buds. On the way down to the beach, the path has been lined by sea buckthorn, chock full of fab orange berries. They are there to help stop erosion - but it turns out they are also a great source of Vitamin C, E & other helpful nutrients. Has anyone tried using them in cooking?