A lot of folk where you are now will use
this type. Takes 5 or 6 sheep very comfortably (more if they're wee primitive types), unbraked 750kgs so can be towed by younger folks. (Not sure of the exact rules, being in the older category myself
).
We had one ourselves when I was up in Cumbria, except as we didn't have the age issue we had the braked one, and a jockey wheel, and could use it to fetch a tonne of feed, too. I liked it much better than the Ifor Williams one, it's a very versatile design and very easy to use. (Though I wouldn't diss Ifor Williams at all, they're good trailers and have a good resale value.)
I can't recall whether ours was the exact make I've linked, but it looks identical. I can probably dig out an old email from when we bought ours if you want me to check. I'll need to wind up the old and now rather creaky laptop to do that,