It's Gromit Unleashed! Last summer  it was Gorilla's in aid of Bristol Zoo ~ a cunningly drafted publicity event involving eighty 5 foot tall gorillas, initially sponsored by businesses and then auctioned at the end (often bought by the sponsors!).
This year [2013 that is...], it's the turn of Aardmann creations Wallace and Gromit getting a turn . . . well, Gromit anyway . . . They have been supporting the Bristol Royal Hospital for Children for many years through the Grand Appeal, but this year they're going one step further - well, quite a few steps further I guess - Gromit has been unleashed!
So, time to start the Gromit hunt!