Since you live in West Sussex, Redhill and Headcorn/Lashenden in particlar come to mind. I liked Lashenden alot, and would have gone there myself had I not lived too far away.
Neoburner, I think you will find Headcorn a tad too far from Horsham. I instruct at Redhill which is about the same distance as Shoreham, but you could also consider Goodwood which is only a slightly longer drive.
I have PM'd you.