According to my time conversion maths, 10am PDT = 6pm BST (BST = British Summer Time)
PDT is 7 hours behind GMT, so normally would be 5pm, but the UK has daylight savings in the summer and move's it's time 1 hour ahead, so during summer the UK is actually GMT+1, thus 10am PDT = 6pm BST.
Edit: Bah! ninja'ed by McSumo (same time to!! 11:11 pm my time.. lol!)