Thanks for all the responses, looks like I have a few options! 🙂
I like the idea of heading over to Newcastleton, or trying out some of the MTB trails. I’ve driven past Kielder on a number of occasions, but never stopped off as we’re normally on our way to Innerleithen etc.
I’ll be back in the area later next week (picking up my mum after dropping her off tomorrow), so my current thinking is to drive up early to ride that first route of yours jonba – thanks for the links.