@reeksy – I live in Ottery St Mary, so would be happy to show you around 🙂 I’m on summer hols from next Tuesday (teacher!)
East hill has some decent trails, but is a bit limited, especially since recent forestry work has killed a load of trails.
Woodbury has some excellent stuff if you know where to look.
Most weeks I’ll do a variation on a 40-45km loop from Ottery that takes in East hill and Woodbury. About 75% off-road, with 1200ish metres of climbing. Lots of singletrack and even a bit of jumpy stuff if one wishes.