Here's the only half-decent footage I've managed to capture of a water shrew. Blink and you'll miss it.
The hedgehog clip is a poser, as it turns out I've mis-labelled what's going on. What I thought was the small hog's mother was in fact attempting to mount the little hog, so I can only assume this is a very small or juvenile sow being courted by a large adult boar. How old is she? How old do females have to be to start breeding?