Soldier Boy: Re York Terrace/Park Terrace, phone book says York Terr, my instinct is with yours in thinking Park Terr.

Local Map on the largest scale available in shops shows York Terr as tiny but in the right place if the front door has been moved at some time, but YP does not even show up on mapping sites I have tried. Certainly going to Park Terr will get you there.

Hence my suggestion of get close, then ask.