I think the point is being missed GP racing has become about markets, cigarettes put a huge amount of money into GP racing, in Europe ciggie advertising is about to be/has been banned think of the Belgium GP last year. The get out for the small person is the track etc but I suspect the real reason is ciggie sponsorship and opening markets. Therfore silverstone and /or anywhere else does not have a chance, watch other European GP's follow. I have no personal knowledge but have been told by a work collegue who is insensed over the decision, that when he went to the Brazilian GP that circuit and its facilities lagged behind Silverstone but ciggie advertising is still ongoing in that country.
Just my thoughts
Keith