Here's a list of their UK retaillers from their site:
Ainsty Castings | Website | Facebook
The Gamers Emporium, Swansea | Website | Facebook
Hadrian’s Hobbies, Brampton, Cumbria | Website | Facebook
Leisure Games, Finchley, London | Website | Facebook
No Mans Land, Maidstone | Facebook
Waylands Forge, Birmingham | Website | Facebook
http://www.crooked-dice.co.uk/wp/crooked-info/retail/Cheers