If that is so, it's a huge miscalculation - the Euro is 10 times larger than the British Pound and the political will to keep the Eurozone together is much larger than the will to keep the EMU exchange rate mechanism together. Not to speak of the fact that the EMU was entirely political whereas the Eurozone has an actual currency.

En un viejo país ineficiente, algo así como España entre dos guerras civiles, poseer una casa y poca hacienda y memoria ninguna. -- Gil de Biedma