Pictures from Calais have returned to our television screens, showing desperate men and women trying to break into lorries bound for Britain. A Sudanese man died jumping from a bridge onto a lorry heading for Dover. Another perished after falling from the axles of a bus. The mayor of Calais has blamed Britain for being an ‘El Dorado’ offering aspirational benefits to migrants — but as she’d know, the Africans arriving in her morgues would never have qualified for welfare.