I don't really know this track
....much
Anyway, at risk of giving all my next to useless secrets away and the possibility of finishing anywhere but bottom 3; here's my take on braking points:
From the grid you have the right kink (folly) and I'm sure you can cope with that but approaching Quarry you will notice a tyre wall on the left; I brake just as the end of the tyre wall is about to disappear out of view ( I use default FOV) (if you are an alien adjust as necessary!!!)
For Old Paddock Bend I use approximately (perhaps ever so slightly past) the mid point between the first and second brake board.
For Tower I use a point just before the speaker cone on the left (close to the white tent/building) goes out of view.
Not a braking point but - at the 'Westway' right kink I begin turn-in at the second to last advertising board.
The final turn (Camp) I brake again using the tyre wall at about 1/2 (give or take a gnats tadger (ish)) a second before the end goes out of view.
Probably completely different to everyone else, and I expect far from technically correct but might help a small bit, but no doubt about it, its a tricky place.
I'll see you in the Quarry tyres
but I hear the marshals are good here, particularly at cleaning up after massive starline incidents around the Folly area - eh Tim