With bmibaby quitting Cardiff, the number of UK airports with a loco based reduces further. So far Teesside (baby then Globespan), Coventry (Thomson), Doncaster (Thomson), Bournemouth (Buzz), Manston (EU Jet). These smaller airports, often coastal, may offer a better passenger experience, but can't sustain the economic model the locos need.
Watch out Southend, Blackpool, even Newcastle!