I'm sure this will not matter at all, but according to my mother who was born in Hungary, (She and my grandparents all came here after the Revolution, and no longer have their Hungarian citizenships) now that Hungary is part of the EU, I am able to apply for dual citizenship there.
Would have been funny though, I know about five words of Hungarian!!!!
I'm pretty sure though, that tebs and lynne are right about the grandparent thing in the UK though, I've heard that as well.