I would use Chris Heywood for XC he is based at Deep Mill but I'm not sure if that open for schooling at moment? But he may know somewere that is? If you google Deep Mill Farm or Heywood equestrian should come up (mayb Haywood?) places would also depend on what sort of height you want to jump, and were abouts in bucks you are, and how far you want to travel, is alot of places around