I use all the pages linked to here and I am sure some of them will be useful to you too.
 

www.bsja.co.uk

The British Show Jumping Assocation homepage

www.bhta.co.uk

British Eventing (BE) promotes and regulates the sport in Great Britain
as well as organising and scheduling many events.

www.bhs.org.uk

British Horse Society

Reg.Charity No 210504

www.imperium-aer.co.uk

Visit my sister site which is all about power kiting