I'm with wilts trf so as Scotty suggested the trf is your best bet to make sure where you ride is legal. All green lanes we use are "roads", and so bikes have to be road legal. Yearly membership is about £60 and you then choose which groups you want to be part of.More than happy to take you out around some easy lanes just south of Bath, or good beginners gravel/grass routes on Salisbury plain.