Dear Mary Joan,
The good news is that there is an excellent on-line directory of names and
addresses in the UK, compiled from several sources. They use the term "UK"
so I suppose that it includes the notorious Portadown in Armagh.
The bad news is that it seems that one can only access the directory by
paying a fee and the minimum seems to be about £ 20 (say $C40) for 100
enquiries over the course of a year.
I feel a bit aggrieved as they suggest that once one has registered one can
get at a limited amount of info without further charge. One cannot.
Best of British luck, as they say. Bob