Buttie, it will not be recommended to stay after sunset. The block has no residents staying already so when the corridor lights are on and ppl start seeing us hanging around there, will attract unnecessary attention.
However if wan, if its a small group of say 3 is fine. Coz not as easy to spot. But if u say whole TS outing of 10 over ppl go after dark, it may not be possible. Can take this offline...