Cessna,
Have used Sheffield City Flying School for a revalidation and found them straight forward and basically did what they said on the tin. Guys very friendly there and were happy to accomodate around you.
Sheffield airport itself it excellent having once been a full blown commercial operation (I think KLM used to use it) although it didnt last very long! Tarmac runway and new airport building, good parking, cafe, etc.
We base our group aircraft there although it is due to become a housing estate in about 18 months I believe so we may have to seek alternative accomodation...!
Julian.