NigelH - just for the record, the BGP 2015 Sunday had 47 visiting helicopters in all (A109 x 19. AS355 x 16, AS365/155 x 5, EC135 x 4, S76 x 3) and that doesn't include the EMS cover, Security, RedArrows commentator etc.
For comparison, Cheltenham Gold Cup day had 55 different helicopters earlier this month, and Royal Ascot last June had a couple of days with over 45 helicopters.
Yes, BGP is much less than what it used to be, and yes, these are numbers of helicopters and not movement or passenger numbers. But they are way more than 10 that you pessimistically predict. Let's give the new incumbents the benefit of the doubt and see what they come up with for 8th to 10th July.