Between thirty and fifty people were arrested today en-masse as a result of their participation in the traditional monthly critical mass.

The helicopter was already tracing circles above Waterloo Bridge at 6.30pm. The mass left the meeting point earlier than the usual 7.30pm. A van with police inside was emitting some unintelligible words and there were police on bikes, too, something unseen in years now, even since the House of Lords decided that the mass was indeed not a protest.

Some people crossed Blackfriars Bridge, some others Southwark Bridge. London Bridge was blocked by police to traffic when the Critical Mass arrived there. A police officer said to all there: “Guess what's waiting for you on Tower Bridge!” There were some scuffles and what looked like an arrest. A small portion of the mass sneaked through the line on the pavement, which was then joined by the rest in the City.

The mass then proceeded without major incidents until Rick Roberts Way. All riders that had reached thispoint were kettled under section 12 of the "Public Order Act", for disobeying the order apparently given by police to stay South of the river, and about an hour later, arrested, taken to a police station in Central London in a bus hired by police, and have their bikes put on another bus.