When I read Skuas post, I thought bugga, but on checking, my refill which arrived yesterday does fit my existing binder, but had it not it would have gone straight back, then I would have bought an AFE guide instead. Is this a way to get us to spend yet more money buying a new binder when there is nothing wrong with the old one, other than it doesn't fit.

I was wrong, it doesn't fit. I didn't look properly. Other than cutting off the top and bottom rings with the grinder, it's first an grumpy email to Pooleys to complain. If it takes as long for them to get back to me as it did to send the guide, it will be a waste of time. AFE is looking more attractive.
I'm not buying a new binder on principal.