This was moving about in between bricks which form a tiny flower bed next to my water feature thing.
Is it a horsehair worm? Is it a good thing to have about?
I've never heard of horsehair worm yarrow but I'll bump you up to the top
I googled it and I think you are right, but it doesn't harm humans. Makes my skin crawl though!
Well that is pretty amazing because I saw those for the first time on Saturday after it had chucked it down. They were around my potatoes, when I first spotted one it looked like a thread blowing around in the wind. I picked some of them up and looked closer to see that they were long very thin worms.