Ms Deirdre Cullen:

Yes, but they are based on administrative sources. Our data are based on someone knocking on a door and determining that no one is living in the dwelling. If somebody turns the key in the lock before going to England to work for a year, administratively there might appear to be someone living in that house even though it is vacant. The UK data are compiled on a different basis. I doubt they are directly comparable. I suppose that is the comment I would make in that regard.