Last night I set up the trail camera in a different position, in an attempt to get some variation between these videos, and also because I thought the hedgehogs would show up better against the dark background of the soil in this position.
I put food and water out in the usual position, but also scattered a few handfuls of mealworms down in this new place. I had been putting a small amount of mealworms here for several nights already, encouraging the hedgehogs to move around the garden a little.
I was quite surprised at how many mice turned up in the resulting footage. It's no wonder that Elsa likes being out in the garden so much.