The noble Lord is absolutely right: responses to public order breaches have to be proportionate. He asks what constitutes serious disruption. It might be subjective, but nobody who has gone around London in the past two weeks could argue that this did not cause serious disruption to the city. The proportionality will, of course, be tested through the courts. The noble Lord asked me how long the ban will be in force. We know when it started but I do not know when it will finish.