As a few other people have said here, simply amazing track! I've just took the M3 GTR; and again only live 25-30 minutes from High Force itself just on outskirts of Durham.
I can honestly say it was probably the most breathtaking experience I've had in an assetto corsa, and this is literally the first comment i've ever made on a mod. I would love to support you with future releases maybe and you could some "extra" trails you could implement being around the Durham / Teesside areas such as the A690/A19 routes into Durham itself and through Brancepth, Crook, Willington, Chester-le-Street as these are probably some of the best / most notable roads in the area.
This has so much potential and currently it isn't lacking at all for a beta! Very well made, the roads felt absolutely correct for driving. I do also agree with a few other comments here including the lovely hidden speed cameras.
Other than that man, very nice job! It was an honour to drive it.