I think it's fair to say that our recent trip to Delamere wasn't exactly blessed with local knowledge: --> http://www.retrobike.co.uk/forum/viewtopic.php?t=212059
That said it's a good place to just go and explore. There aren't many hills and the trails aren't particularly tricky or technical.
Just go along and see what you can find.
If you head east you'll hit the edge of the Peak District. I'm in Macclesfield and there is some good riding to be had in Macc Forest and further out into the hills.
The emphasis is on hills though as it's not exactly flat.