We have seen plenty of hedgehogs in the grounds recently but never during the day. This hedgehog was found curled up out in the open at midday, and that usually means something is wrong. There were no external signs of injury fortunately. After checking with St Tiggywinkles (see link), we placed it in a cardboard box with some hedgehog food (which of course we have to hand), and some water. In the absence of a local wildlife hospital, the emergency vet recommended keeping it safe for 24 hours and then releasing it back into the garden. We shall see. These situations are strangely disarming.