For those wondering what BTCC circuits are available...
Donington Park - official S397 DLC
Brands Hatch - official S397 DLC
Thruxton - odb workshop, conversion of Lasercutter's rF1 version
Oulton Park - odb workshop, conversion by Digga, Nuno Lourenco enhancements
Croft - official S397 DLC (after Nov 7)
Knockhill - Lasercutter workshop
Snetterton - not in workshop... google for SenorMen conversion
Silverstone - official S397 workshop