Can't believe nobody's mentioned Hotel Chocolat yet. They're available in some department stores in the UK (I know John Lewis do them) and we recently got a dedicated store in Liverpool. I get my fiancee stuff from there for all special occasions and it's always amazing. Also discovered these little treats over Easter which are divine:
Salted Caramel Egglets. You just suck on the amazing chocolate till the shell eventually cracks and the gooey salted caramel goodness fills your mouth. Sounds a bit erotic and it probably is!

Salted Caramel Egglets. You just suck on the amazing chocolate till the shell eventually cracks and the gooey salted caramel goodness fills your mouth. Sounds a bit erotic and it probably is!