People often get confused between trail riding and trials riding. As I think you realise riding on green lanes and such tracks is trail riding. Going over seemingly impossible obsticles without putting your foot on the floor is trials riding.
I used to enjoy trail riding, with a couple of mates, in winter over the Yorkshire moors and tracks in the Lake District. That was many years ago on a slightly modified Suzuki SP370, so I can't offer advice on what would be most suitable these days. What I can say is that you can't just ride anywhere that takes your fancy, those days are long gone. When I was last trail riding in this country you had to stick to track that had vehicular rights of way. Sometimes shown on O.S. maps as RUPP (road used as public path). At the time I got O.S. maps marked up by a club called "Trail riders fellowship", but I don't know if they are still the best source of information. I know a lot of good tracks got down graded to footpaths but then later on I believe that was over turned. In short some investigation required unless some more upto date info turns up here.
I used to enjoy trail riding, with a couple of mates, in winter over the Yorkshire moors and tracks in the Lake District. That was many years ago on a slightly modified Suzuki SP370, so I can't offer advice on what would be most suitable these days. What I can say is that you can't just ride anywhere that takes your fancy, those days are long gone. When I was last trail riding in this country you had to stick to track that had vehicular rights of way. Sometimes shown on O.S. maps as RUPP (road used as public path). At the time I got O.S. maps marked up by a club called "Trail riders fellowship", but I don't know if they are still the best source of information. I know a lot of good tracks got down graded to footpaths but then later on I believe that was over turned. In short some investigation required unless some more upto date info turns up here.