In reply to Timmd:
Definitely a cool place to be at the top there. Were they "daredevils" as the piece says though?
They snuck into a building over the turnstiles. AFAICT no-one noticed them and there was no chase or anything. They then take a lift and some stairs, open a door and walk out onto the roof. An easy pootle to the top is about as daredevil as it got. Pretty massive exposure, but really it was like a gently sloping ladder.
I'd place it at about the level of sneaking into someones garden when you're a kid to climb an apple tree and scrump the apples.