Jamesbrown, sorry Sheffield airport was not run into the ground by Peel, although maybe when they took over they had little interest in it as anything more as an airfield for club, private and business jet operations.
The fact is that Sheffied has was built with a too short a runway and when it originally opend it was not allowed to operate single engined aircraft although this has changed. The problem was that although there where operators willing to use the place this was to little to make the place viable. If they had had the single engined stuff from the begining this might of been different. Then on top of this 9/11 happend and airport around the world were effected. Sheffield unfortunately was unable to cope, new airport that had been constrained from the word go just wasn't going to survive in that climate as an airport offering scheduled flights.