alwayslookingup - I join a club that gives me benefits and, while a member, pay an annual subscription. If I then choose to leave - I don't expect to get back my membership fees for the years I've been a member.
I have already enjoyed the benefits of being a member so I'd consider my investment 'spent' accordingly. Whatever happens to that club or its assets in the future is no business of mine - I've chosen to leave. Hey ho - all theoretical thankfully
Of course, all that presupposes that the UK is England's 'club'.
Do love these Scottish independence debates. I give it a couple more posts before it slides into anarchy and bedlam...