I did my conversion at WLAC, about 3hrs in their Super Cub. Then did two hours in my RV tailwheel as a checkout etc.
I did mine at Thruxton.
I'm not sure whether they have any tail wheel aircraft available to rent there though
Thruxton did have a super cub - was going to do my conversion with them - but somebody re-modeled it and it is no longer!! I don't think they have a tail wheel training/rental a/c any longer. Shame as training at Thruxton would be good. They have tarmac and grass, and circuit is not busy.
Tim