It's not part of CE, but if you are in London early for the event, you might want to go to the Gentle Giant Tour on Thursday July 12 at 5pm. It takes place at the Forbidden Planet Megastore on Shaftesbury Avenue. You can see more details here on TFN, along with links for FP's website. Forbidden Planet is worth checking out anyway if you have the time. It's a great store, but it can be a bit expensive.