Under the radical proposals EU countries will lose the right to have their own army, criminal law, taxation system or central bank, with all those powers being transferred to Brussels. Controversially member states would also lose what few controls they have left over their own borders, including the procedure for admitting and relocating refugees.

The plot has sparked fury and panic in Poland - a traditional ally of Britain in the fight against federalism - after being leaked to Polish news channel TVP Info. The public broadcaster reports that the bombshell proposal will be presented to a meeting of the Visegrad group of countries - made up of Poland, the Czech Republic, Hungary and Slovakia - by German Foreign Minister Frank-Walter Steinmeier later today.

Excerpts of the nine-page report were published today as the leaders of Germany, France and Italy met in Berlin for Brexit crisis talks. In the preamble to the text the two ministers write: "Our countries share a common destiny and a common set of values that give rise to an even closer union between our citizens. We will therefore strive for a political union in Europe and invite the next Europeans to participate in this venture."

The revelations come just days after Britain shook the Brussels establishment by voting to leave the European Union in a move some have predicted could lead to the break-up of the EU. A number of member states are deeply unhappy about the creeping federalism of the European project with anti-EU sentiments running high in eastern Europe, Scandinavia and France.