What's this then?

Some great footage of a hedgehog on my trailcam last night, but sadly before midnight so not a candidate for today's blip. Busy day again, and my evening plans for a garden wildlife stakeout have been thwarted by our neighbours having a garden party this evening, which I'm fairly certain will keep all furry and spiny mammals away. So I've drafted in my digital microscope for the first time. I tried for a wood louse, but it turned out to be a wouldn't louse- it wouldn't keep still. So I went for something I found during my clearout. I wonder if anyone can tell what it is. Not as obvious as it might seem.