Leila Deen has been cautioned for her action in throwing green custard in Peter Mandelson's face in protest at the proposals, which he strongly supports, to expand Heathrow Airport. She belongs to the group "Plane Stupid". Her action has attracted a lot of criticism but she is a young woman who obviously feels she has a big stake in the future of the planet. Her activism is her version of service. Does Peter Mandelson have the same stake in the future? Is he serving anyone except himself? Does anyone expect us to believe that if Leila had stayed at home and written him a polite letter it would have made any impression at all on him or gained any publicity for her cause.