It wasn't me was it, although saying that most likely wasn't be as you said they were taking photos of Interchange itself, As for the Nexus Ruling I have opted to simply ignore it and take photos in the Bus Station as I please, if I am then confronted then i'll inform them of the Photography Law which they are clearly unaware of.Not sure, this was between where the taxi rank and the metro station is.
RE: Trespassing