Hi Nicola
Where I live in Norwich I try to vary my route as much as possible so I don't get too bored!!
There are plenty of places to run, Mousehold Heath near the centre of Norwich is a good crosscountry run through the woods and you wouldn't realise you're in a city! Another good one is running along the river path from the Law courts down towards Cow Tower through to Pulls Ferry, seeing the cathedral on your right, you can either head into Cathedral close or continue along the path to Prince of Wales Road and then decide the rest of your route from there.
The one I ran today, goes along an old railway path and will eventually connect to the Marriots Way footpath which you can follow to Reepham, its fairly flat but is relatively traffic free, takes you through the countryside, some of it is woodland. The distance depends on how far you want to run. To Reepham is approx 14 miles, its a good idea to have someone the other end to drive you back though!! The main routes are not hilly but its possible to add hills in, especially near the cathedral as there's Ketts Hill and Gas Hill which are quite steep.
I think I have seen a picture of someone running across Mousehold with the Cathedral in the background in an edition of runner's world. its a great mazagine with lots of handy info and articles.
Not sure if this helps though.
