Ignore the people fretting about a “two speed Europe” today. There’s been a two-speed Europe for at least as long as the Euro has existed. Actually, it's been a multi-speed Europe, when you count things like the Schengen area, the EEA and, indeed, the EU itself. There’s no problem with having a multi-speed Europe, if Britain’s in the right lane. The real question is whether any of this will mean anything after the real world has its say.