According to a friend who is senior cabin crew management at BA Gatwick there are major changes on the cards at both LGW & LHR. Aircraft groundings & lay offs. Virgin have gone through a fair bit of expansion in the last few years adding more routes & increasing frequencies so probably some major reshuffling due there too.
In answer to a response much earlier on 'Monarch Airlines' appears to be the only surviving UK airline to have stayed in its original form through thick & thin. They really are a truely remarkable company & they never cease to amaze me.
I wouldn't be surprised to see the following disappear from our skies:
Astraeus
XL.com
Palmair European
European Air Charter
Air Southwest (possibly merger with Flybe?)