No we don't do bike days, just car stuff. I used to race bikes but I packed it in many years ago, cars are safer and harder to fall off
It's tough to make Brands pay, you have to charge a lot or book too many cars in compared to the northern circuits that cost the same or sometimes less to rent but will fit more cars on them without feeling overcrowded.
TBH, you are at the wrong end of the country for decent tracks, I can get to Oulton, Cadwell, Croft, Anglesey, Rockingham, Silverstone, Donny, Bedford etc all as day trips