[pedantic mode on] If there's one thing that really irritates me it's people calling a Register Office a Registry Office. It's amazing how often this mistake is made, and even more amazing how many educated people make it. I've heard the mistake made by BBC presenters (who should know better) and by family lawyers (who definitely should know better). I've even seen it in divorce petitions prepared by solicitors and allowed through by the court. The place where the register of births, marriages and deaths is kept (and where marriages take place) is called the 'Register Office', not the 'Registry Office'.
Well, that's got that off my chest... [/pedantic mode off]