As already mentioned, the Hennessey hammocks are well worth a look and a few of my mates use them. You'll probably need to budget £150-200 for one but keep in mind that they're a complete system with the tarp included.
Personally, I use a standard Woodsman hammock (no bug net) that was made by Mat at UKHammocks.co.uk. He's come in for some flack recently owing to some problems with some orders but I (and many many others) have been very happy with the service and the products. My hammock is 3yrs old now, well used and still looking the same as when I first got it.
Another UK based business to consider is bespokeultralight. I've no experience with his gear but the hammocks look great, are reasonably priced and I've heard lots of good things about them on here and youtube.
This won't go down to well with some folk on here, but....I'm not a huge fan of the DD Hammocks. The tarps are great, but I think the hammocks are typically too short and too narrow to offer a comfortable flat lay. Admittedly, I've never owned one, but everyone I know that has had one (and that's quite a few!), went on to upgrade to a Hennessey hammock. I think that kind of speaks volumes. I don't mean that to be derogatory against DD Hammocks as they're considerably cheaper than most of the competition. But if you can afford it, look elsewhere.
