Wet @ Silverstone this Fri? - http://www.bbc.co.uk/weather/2637827
12-16C, 19mph Northeast wind - 'Mostly cloudy early rain clearing to leave showers on Friday. Rather cool with a mixture of bright/clear spells and occasional showers, some heavy, over the weekend. Windy at times.' Back in the last MOTOGP/Silverstone period rain/sunny spells at the GP meant sloppy mud banks packed with knotted bundles of steaming Motorhead fans
I'm inclined to take the day to walk around the circuit in reverse from Club (nearest corner to my in route). The grandstand enclosures are free so I ought to be able to get thru them & cover most of it, other than Wellington Straight. When I was there last year you had to cut from Luffield to Abbey via the old Bridge Corner & then work back up to Farm Curve, The Loop & Village/Aintree.