The two Hedgehogs continue to visit the garden each evening. Last night I only saw Honey. I can tell by her size and by the fact that she ran away at full speed when I went out to try to get some still photos of her. Henry normally stands his ground and waits until I go away so he can resume eating. Honey is having a fine time finding the dried mealworms I had scattered amongst the crushed peanuts.
I still haven't managed to record the loud snuffling which only seems to be made by Henry. I have tried several searches to find out what the sound indicates. It depends which site you read as to what the meaning is. Two places I found which tell of several sounds Hedgehogs make are here and here.
A very interesting blog I found is Hog Blog with many terrific pictures and videos of Hedgehog visitors to a garden. If you are interested in observing them then it is well worth a visit. There I saw activity similar to that seen here where Hedgehogs face each other nose to nose. You will see some quite aggressive behaviour where Hedgehogs charge and bulldoze others out of the way. Not the cuddly, if prickly, creatures we normally think of. There is definitely more to Hedgehog behaviour than meets the eye!
I am still debating whether I have a pair here or an older adult and one of the offspring I saw last year. The snuffling would suggest that it could be more a 'keep away from my territory' than a 'is it time to make babies' type of communication.