I have wondered about mapping Cork University Hospital for O, but I think too many of the controls would be too close to patients' bedroom windows. Did you startle any bedridden old people during the run?
Not that I noticed! Although I did startle a couple of nurses out for a smoke.... Most of the controls weren't on building corners but on trees a few metres away from them. Also Antrim has quite a few patches of woodland so we sort of stuck to them.