Are there some new rules that you are aware of?
If it's anything like it is here in the States, the regulations are poorly understood, even by sworn LEOs, often misinterpreted, and sporadically and overzealously enforced. A few notes ...
Back in the 1960s photography was officially not allowed in the NYC subway, and it was one of the things included on a very cartoonish "thou shalt not" poster in various stations. I did it anyway, and was never confronted. I used the Mamiya SD without flash.
That changed sometime after I moved away.
Nowadays, on paper at least, personal noncommercial photos ARE allowed in both the NYC and Chicago subways, with some restrictions, of course. Cops, station agents, and other employees don't always think it's allowed.
A couple years ago when I was taking some casual shots in the Chicago subway (Blue Line) a maintenance guy approached me and asked "are you the CTA photographer?" I was dressed business casual and had a conference badge around my neck, so I guess I might have passed for some kind of "official" photographer - LOL! I said I was not, and he told me that taking photos in the subway was "illegal".
Now before I left home, I checked, and there was a Rail Service Bulletin saying that it *WAS* allowed, but I didn't feel like educating him, so I feigned an apology, capped the lens, and moved on -- to another station and continued shooting.
🙂
Then there's the Las Vegas Monorail. I happened to be in town the day after the Monorail finally (re)opened, and I had a mostly-free afternoon, so I decided to shoot the system. Nobody stopped me, and I even asked a security guard if I could take his photo and he promptly snapped to attention and I snapped him.
🙂 Then ...
... I was at the Flamingo station, waiting for a train to pull out of the IP station, and with me at the end of the platform were two guys, one with a video camera and another with a huge honker flamethrower zoom lens on a SLR. (I was using the Olympus P&S.)
We were obviously waiting for the same thing to happen, and we struck up a conversation. The SLR guy asked me if I was at the IP station, and I said I was just there. He asked me if anybody said anything to me about taking photos and I told him no.
He said he was just up there and a security guard gave him the "illegal" song and dance, and said that they would turn him in to the "FBI and Homeland Security" if he continued.
This was the second day the Monorail was open, and there were quite a few people there taking photos openly. There were no "No Photos" signs, no circle-slash-camera icons or anything. Why this guy was singled out is beyond me!
Anyway, most of the photos of that shoot are here, if anybody cares:
http://world.nycsubway.org/us/lasvegas/
Wow, didn't intend this to be so long, sorry.
🙂