CVT:
It's not so much the "credit crunch" (thats credit squeeze in English - as opposed to American) but the weak pound which has meant that, combined with the high cost of living in UK, migrant workers from Poland can now get a better overall standard of living in Poland, than they can in UK.
Unfortunately inbound tourism from the Polish regions isn't significant, except possibly to London, so without the flow of those migrant workers and the associated VFR traffic there are bound to be cuts, and I wouldn't mind betting that Ryanair won't be immune.