The route I choose to take each day on my Brompton commute is via St. Katherine's dock and the bridge has been taken away. There is an alternative pedestrian bridge that runs across the top of the lock and I suspect that one or two cyclists have been guilty of anti-social behaviour.
Clearly there has been some sort of incident and prominent no cycling signs have been erected everywhere.
And the Troll? A security guard now stands watch over the bridge to ensure cyclists (who can't read) dismount.
I wonder how long the bridge will take to repair (before it becomes an irritation)?