All last night's video captures where a hedgehog was present showed just a solitary hedgehog. Whether they all show the same individual or if a number of different hedgehogs were visiting at different times, I do not know.
It's interesting to note that whereas on previous nights there are no video captures of hedgehogs past 11:30pm, last night there were hogs still showing up at gone 3:00am. I wonder if the rain had anything to do with it?
By the way, there were mealworms scattered all over the grass; they weren't just in the white bowl (which was just as well, because in some shots you can see it's full of rainwater). I scatter mealworms on the ground because it makes for more interesting viewing to see a hedgehog snuffling about than one sitting with its nose stuck in a bowl.
There must have been a few mealworms left over by daylight, because of the presence of the robin, who we see in the final couple of scenes of this video.