London’s Critical Mass cycle ride has taken place on the last Friday of every month since 1994. The Metropolitan Police, who had always been helpful to the rides, suddenly tried to bring a test case last year by prosecuting one rider for breaking the law by being in the ride. The cyclist, Des Kay, successfully challenged the Police’s claim that the ride was unlawful. The High Court said it was not a notifiable procession under the Public Order Act. Furthermore, the court said that there was no need to notify the police of the London rides as they knew from experience when they would occur.