1. Damselfly larvae
Or at least I think it is a damselfly based on the external 'gills' at the back end, but no idea which species. There should be three of those gills, but all the ones I netted had two which may be relevant.
This one is a Two-spotted Water Hog-louse [Asellus aquaticus].
From here on the stuff was a bit more obscure!
This obscure blob was c15mm and round-headed when out-stretched, about half the size when blobbed up. Very slow moving and nothing like a leech. I've got this to Dugesia polychroa.
Not the big snail, but both of those had one of these riding their shells. A good look at the eyes, along with the general shape and colouration, makes it Glossiphonia heteroclita. There are actually three pairs of eyes but this is only apparent when it stretches to move around in typical leech fashion. Here's a couple of closer shots, though the one showing the eye arrangement when stretched is a bit off-focus as it was moving.
A bit strange the way these moved as they were upright as they scuttled about. Anyway I got one under the microscope to check some features, and I've convinced myself that this is Crangonyx pseudogracilis.
Not a bad effort really, and I'm looking forward to having a good poke around in more suitable location. It's just as well that I nipped out yesterday though as today has been proper miserable with some heavy thundery showers and a bit of hai with brief bright interludes.