Unfortunately Intuit pulled Quicken out of the UK market. MS Money hasn't been updated for the UK since 2005
Ron, iBank looks like it might be OK. They say it should work for non-US customers as long as their bank supports OFX statement downloads (which most UK banks do). Their website does say that you can create custom categories. Is that not the case?
Will iBank profile what your balance will do over the coming months based on regular incomings and outgoings? That's one thing I liked with MS Money. At the moment I'm using a simple spreadsheet, but these dedicated finance apps are a bit slicker.