The Hole in the Hedge

A children's book with an element of fantasy in it. I can't remember very much of the plot as it must be over 50 years since I read it but it made quite an impression on me. I think it was about some children who from time to time went through a hole in a hedge to a place where magic might happen (or was it just an alternative version of the real world?). I think bees and/or honey may have come into it. The story is about a small boy who goes through a hole in the hedge where he meets a rabbit called Cusimuff who befriends him and takes him on a journey to meet a giant and some fairyies. There is also a man with an exiting bonfire. At the end of the story he returns home to find that he has a new baby in the house almost the last line is "Its Cusimuff"