Hi,
Stuff is a real personal thing. Seeing that there are some things that you obviously love, you'd probably hate to get rid of these items, especially if you plan to go back in a few years. If you do lend things out, you might want to prepare yourself that the stuff might not be in the same condition that you left it. Not that anybody would intentionally damage things, but there is wear and tear...
Furniture and general household things over here can be pricey. You might want to consider kitting your UK place out with some second hand stuff rather than buying all brand new. It'll leave you cash to buy things here that you like so that when you do decide to return, you can bring back all of your great British acquisitions that mean something to you.
I, personally, could never get rid of some of my things. I've lived in England for eight years and back in my early twenties, I lived in the Virgin Islands for three years. While I was there, I let my brother use some of my stuff and stored what I didn't bring with me. When I moved here to England, I knew it would be for a while so we shipped our entire household.
Now we are in the process of moving back to the US. I have so many things I love from all aspects of my life; I couldn't imagine being without them.
Having said that, we've got a lot to ship. The movers confirmed that we have to have a 40ft container... but to me, it's worth it because different things remind me of wonderful people, places and time. I'm afraid I'm no minimalist.
What you do should depend upon how much you love your stuff!
Regards,
Kellie