Remember guys you can always join our series in an 1800 Si (which are essentially as quick as the STs) or a 1400 Zetec. Both those kind of cars are readily available and are cheaper than an ST and not much more than a top notch XR2.
Or buy one of the 4 (!) STs Ryan has and convert it to a race car yourself for a lot of effort but not much cash.
Yeah I know, the last time I looked a sleazyjet flight from Scotland to England, if booked a few months in advance, was about £15. Storage will cost roughly the same as Knockhill, race entries are not much more expensive.
The only real difference is transportation to the event which when shared out will mean that a race weekend does not prove to be significantly more than an SMRC meeting.