My hon. Friend speaks with his usual wisdom on this issue. The knock-on consequences of such traffic obstruction are economic but also emotional. We have seen heartrending stories of people who have been unable to attend to sick or elderly relatives in hospital or who have been prevented from, who knows, getting to job interviews that might have clinched a bright future. All sorts of impacts are brought to bear by this kind of selfish protest. At the same time, the great sadness is that it diminishes, not enhances, enthusiasm for the cause that these protesters seemingly want to promote but are, by their actions, damaging.