I like Biggin as an airfield (my home base as a PPL for while) and the airshow is usually very good but the road traffic situation is unacceptable.
Strangely it was the traffic that contrived to mercifully spare me the Air Cobra accident a couple of years ago as my nettled partner and I, having got into the show after a hot 3 hour wait in the car, contrived to have a huge row and we immediately left 10 minutes before the tragedy.
I am happy to say I am still with said partner but have not gone back to Biggin for airshows.