Just thought I would share my experience in case any of you have fallen into the same trap as me.
Apparently I opted to be a member of Amazon Prime a few years ago and I vaguely remember that there were some benefits including free priority shipping which I got when I signed up for free. I guess there was some small print that I didn't read stating that there would be an annual charge if I continued to be a member, but I guess I forgot that as I was intended to do.
Anyway, I was looking through our bank transactions the other day (something I do very rarely to be honest) and I noticed a £49 charge to Amazon and I was sure that I hadn't bought anything from them recently.
After a bit of research, it appears that I have paid about £50 per year for the last 4 years for this service that I don't really use.
Thankfully I got a refund on most of this years charge, but I am a bit irritated (mostly with myself) for paying >£150 for a service I haven't really used.
If you're an amazon shopper and have that little blue prime label next to your user name, check that you're getting your money's worth from it.