I think the point is, some in the UK thought we'd just stay in it. Which we clearly can't do. We have to leave, and then sort a new agreement based on our new 3rd country status, and no one knows how long that agreement will take to negotiate, do they. So for a period of time, there is a likelyhood that we'll be out. That isn't a controversial statement is it?
Why couldn’t we stay in?
China are in, Morocco are in, Israel are in, and many others,
What I meant to explain is that the EU using it as a pawn is a mistake, the thing holding back Russia isn’t the 5,000 troops on the border, it’s the symbolism that you take one on you take all on, the value of an EU GPS is that it helps bind the military of Europe together, shared systems and shared technology with a shared focus on what it needs to do, excluding the UK cheapens the product,
The actual system is not that hard to build, the Uk could easily build there own, or join one of the other competing systems, but even if building our own is made technologically better, would still not address the unity in defence that the EU one achieves, but loses if we are not included,
Staying in the EU is the easiest solution to every problem bar the referendum problem,
That doesn’t mean that excluding the UK from the system, or even threatening to do that isn’t a mistake, or that the UK withdrawing from it isn’t a mistake either, it’s a bad idea from both sides, because both benefit from it.