The fog is lifting and its slowly getting clearer, you want a race licence not rally yeah ?
What licence are you wishing to upgrade from ?
If its a Nat B race licence then you have nothing to do, if its a Nat B rally (driver) then
www.motorsportvision.co.uk do hold 1/2 day courses at Donington
You will need a medical for a race licence - and the list of doctors that can do that is here
http://www.msauk.org/Go_motorsport/doctors.htm