So Mr Cameron is in quite a powerful position. The eurozone story proves for the first time since we joined that we do not need to be on the same train/bus/boat as the core. Indeed, it shows that we can be better off if we aren’t. We are out of the euro without mishap. We could, without disaster, though not without difficulty, be out of the whole EU. As negotiators, therefore, we have a real choice. We do not have to make token demands and then capitulate – so often the pattern of the past. Mr Cameron can ask for some big things and walk away if he doesn’t get them. If our partners believe that, they are more likely to concede what he asks.