Yup, those be royston trails, built up by a group of my old mates, good old day's, i used to race at the track round the corner from there aswell (Y)
And yeh, those trails are quite nasty, i broke my ankle there last year. Seem's about the same time i quit riding dirt, funny that (Y)
They are dead now though, they have houses on them so they are now the other side of the big road ! lol :D