From the Track Time Details, verbatim it says....

Briefing takes place in the Brooklands Suite next to BRDC Clubhouse. Please organise yourself to arrive at the briefing room 10 minutes (at least) before your briefing session starts. Multiple Track session people need only attend the first briefing allocated. YOU WILL NEED TO SHOW YOUR DRIVING LICENCE - BOTH PARTS IF YOU HAVE A PHOTO LICENCE