PPR for Barkston is normally via Cranwell Ops. When I worked there (Barkston) OC Ops Cranwell had a real downer about light civil aircraft using Barkston as he thought it was "dangerous mixing them with elementary students" and insisted they went to Cranwell instead. Things might have changed since then - give Cranwell Ops a ring. It's only half a mile from Ancaster so would be perfect.
If it's not a player there was (is?) a guy who operated a C150 out of a field near there that might be a player. I don't have the number but the Tower at Barkston (01400 - 230621) should have it in their "useful numbers" book.