I don't buy that - if it really was only 15 minutes to the centre of London that would be fantastic - but last time I checked, it took me over an hour to get there by train! If the area wasnt already a quiet residential location, fair enough - but that's just not the case. It's inappropriate to host large events of 15,000 late at night, with no parking, adequate management or supervision. 4 times a year or even once will be horrible enough for local people, especially if the Jerk Cook off is an example of how it will be managed.