Can everyone who wants a VFR route across the Heathrow zone do some research into the arrival and departure routes and come up with a route that works without as someone said earlier ATC having to move heavy metal?
Try to do it with the current 2500ft TMA base and then again ignoring the TMA but not above 5000ft.
You will do very well.
Luton has a VFR corridor over the top! Do many ask for or use that?
Regards,
DFC