It is my understanding that this has been proposed because of the poor flying standards at Silverstone 2007. As I was cut up twice by the same company (who were later hauled into ATC for a chat) I have some symapthy, but I am not convinced that this is the way forward.
A more practical solution to me would run along the lines of:
1. All Chief Pilots/ Senior Pilot to attend
2. All pilots who haven't flown in before to attend
3. All pilots of Non UK registered aircraft have to attend
4. Pilots who haven't attended the brief have to sign for receiving a brief (including details of who briefed by). This is returned to Silverstone ATC (as per Cheltenham)
5. Any pilot who misbehaves on the day is held until all other helis have left and invited for a chat with Feds on Monday with their Chief Pilot.