There may well be less access at the F1 event than at WEC. So whereas at WEC I was able to walk to the outside of the new loop where there are a couple of photograper cutouts in the fence, I suspect those areas are off limits to the general public for F1. I'll test the water 1st thing on Friday morning and see where I can walk to without getting stopped
My personal choices for spots are Silverstone, in no particular order, are:
1) Luffield, the terrace on the outside is high enough to shoot over the fence as they do the run between Brooklands and Luffield.
2) Through the fence at the braking zone for Brooklands, getting as close to the fence as possible and panning.
3) In between Vale & Club, again right up against the fence to focus past it and have the Wing in the background.
4) The end of the Becketts complex there is a photographer hole in the fence, very low down. You have to sit on the grass to take the photo through it.
5) Copse corner, as Tim has posted above
6) The inside of Copse corner, access through the Copse tunnel if it's open for F1.