Tonight at 6pm at southbank is the meeting point for the beggining of the 12 year of Critical mass in london, peacefull protest by cyclists where cyclists get together and take the roads back in the centre of London. There are no leaders, whoevers at the front decides which way to go. Police cycle escorts help enforce the stoppage of the traffic to help keep it a peacefull protest.
Critical mass is on the last friday of every month