I have done some UK enduros about 8 years ago, they can bee a good day out and if you choose the easiest level clubman B you end up with about 2 laps of 20 miles in a forest at a reasonable speed (can be really hard work if its boggy!!!)
But, no entry on the day, expensive entry fee, you use loads of petrol, and its normally an early start and a late finnish!!
Trials is much more sociable and laid back.