Bristol is nice (Yes it's a city and county too -not Avon!)
Stamford is a nice town in Lincs, lots of places to eat for 30+yrs George Hotel is good to stay in for an old fashioned hotel.
Peterborough? I think every place has lower spec areas like Southmead in Bristol.
Peterborough has great surrounding areas and places like Longthorpe and F. Medows are really nice. You won't see them by driving through…
It may be flat but if you're a roadie-there are some hills but there are so many routes and you ride to Grantham and back.
I was dragged to Sheffield to see some gardens etc I was stunned how big the staircase stream was. You really have to look for nice places and put away prejudice.
Just have a look through English heritage guides for places to visit.
Bath -I love riding there and back on the roadbike-plenty of hills and loverly limestone buildings, plenty of friendly places to eat and friendly walkers with their backpacks waving back at you on the cycletrack.
Bradford upon Avon near Bath has some nice places to eat.
Stowe Gardens is my favorite place.
Punting in Cambridge?
York cobbled streets -shopping town area is great too.
I love England! but then again I love this planet :O)