Two Toyo R888 195/50x15 tyres in SG soft compound, with about 2mm tread. £20 the pair.
These have been on the back of my Civic for about 5 gymkhanas, and will last another on the back of a fwd car. [Sold to Chris]

Four old Silverstone S-525 15/62-15 forest tyres with 5 to 6mm or tread. £80 the set.
Would be good for a Debden gymkhana in October or even the Preston.

I can bring these to Woodbridge this weekend.