Are you completely out of your minds?
As an air traffic controller at Heathrow you will NOT BE MADE WELCOME!! Do you not think we have better things to do than find ways to squeeze you and your stupid little single into an already overcrowded system.
If you phone us in ATC for permission the answer will be no. We will phone the aerodrome authority and they will say no. If by some miraculous chance you get into Heathrow then you had better get your chequebook ready 'cause it isn't going to be cheap. The landing fee alone will be at least £250, plus it is mandatory handling as well. But before you get to go out... you will have tea and biscuits with the Aerodrome Authority and you won't be sitting down!!
Go and find somewhere else to play.... It's not like there aren't enough places out there!!