Id say woburn or wisley, heres the website for woburn, http://www.woburntrails.co.uk. At wisley you have to be a local i think, that what ive read any way, oh and theres chikcsand
never been there and prob not good enough to even ride them but wisley aka jimmy pratts trails look by far the best
wisley are not jimmy trails. theyre dug by lots of people, he has his own trails in surrey not to far away
there are lots of amazing trails in the uk, most in the south east. best not go spreading around where they are. if you know, you know and if you dont then unlucky. i know where many of these places are but wouldnt want to raise attention to them as the people who dug them most likely dont want people flocking to their jumps
newton abbot, devon its not to far from were i live, so when my mate learns to drive we're gonna take a trip out to there. theres also a 4x track next to the jumps.