Thanks for the replies guys, but don't put words into my mouth - I never mentioned the Middle East or Doha! There are other places where you can fly A320s.
As I thought, there's a lot to be said for a command in the UK, decent'ish money, good lifestyle but no opportunities to move to something bigger within the UK even with jet command time.
flyforfood1, yes tough call it is. But its not just about flying bigger and shinier jets. I've been around long enough to know that the grass isn't always greener (it hardly ever is). But I do want to maximise my earnings and make myself as employable as possible and an A320 type rating does both much better than a 145 command.