It is one of history's most mocking ironies that the German customs union, which set out to dominate Europe and conquer Britain in the form of Bismarckian or Hitlerian military force, has at last vanquished the victor by drawing Britain into a Zollverein which comprises Western Europe and aspires to comprise the Mediterranean as well. If the ghosts of the Hohenzollerns come back to haunt this planet, they must find a lot to laugh at.