Last Sunday (3rd June) Tower Bridge was raised during a river pageant to celebrate the Queen's Diamond Jubilee. Despite an overcast day it yielded a couple of reasonable shots for souvenir hunters.
The Queen's barge approaching Tower Bridge

Available as a post card and as a stein/ mug:
Tower Bridge raised. Some of the craft taking part in the pageant can be seen passing under the bridge and continuing downstream:

Available as postcards, greeting cards, mugs, fridge magnets, key rings, mousemats, tee shirts and bags.
Delighted to have sold some so quickly.
I think these mugs look particularly nice:
