The "Byelaw" thing applies on most council controlled car parks as well as on places controlled by the likes of the railway. I worked for a local council for a couple years after I left the railway and I was mostly involved with parking enforcement. Oddly the local ASDA car park was controlled by the council whilst the Market car park was controlled by a private company and this caused all kinds of confusion. People having called the parking comnany's bluff on the market car park would try the same trick at the "ASDA" car park and come unstuck. Another car park where there was fun was the one adjacent to the local McDonalds .. for some reason the McDonalds punters seemed not to notice that the car park was actually for the council offices which were on the opposite side of the car park. Dopey cunts would park up go into McDonalds come out and find a penalty charge notice on their cars.