Well I had to pass Duxford to get to Stansted from Cambridge and found there was a classic car show on at the airfield. The A505 roundabout was blocked by people going to the airfield, no police control and the people (nearly used another word) were very reluctant to leave a gap on the roundabout to let cars get to the M11. I think they went ticket-only after the 2 Lancasters were there a couple of years ago and closed the gates at 0930 and not even Friends of Duxford could get in.