I think most training facilities have been listed on this thread. I don't know what the exact Google search would be, but if your interested in flying anyhow, go down to a local airfield and buy a CAA chart. It will show all the airfields around London and the surrounding areas. The little circles will be unlicensed airfields (generally means they don't have manned fire truck facilities), and the ones with a pink surrounding circle means they are licensed. Either will probably offer some kind of flight training, unless they are farm strips. Googling names off of a chart might be your best bet. It's already been mentioned, but I wouldn't travel too far from home.