|Bigger than a breadbox.|
But then, a guest on the BBC was just quoted as saying the Euro itself is now doomed; it is only a matter of time. And the EU itself is likely to break up when this happens.
England may then not be the only European country interested in chipping in instead with NAFTA. Among those shopping for some new association might well be Ireland, Spain, and Portugal--all turfed out of the Euro as bad financial risks. All three have powerful New World connections.
I can see a possible reunion, not just of the old British Empire plus the US, but this also combined with the old Spanish Empire plus the old Portuguese Empire, for a that much more formidable free trade area. This free trade area would be far stronger than the EU, because it would combine areas with a great diversity of resources and economic strengths, along with greater unity of language and culture. It could include two important emerging powerhouses, India and Brazil.
It would permanently dwarf China.