Who Sank the Boat by Pamela Allen

Every time I pick up this book I always ask myself, "Who sank the boat?" The illustrations in the book are great and the rhyming is too! I have loved this book since I was little, the first moment it was read to me.  My favourite character in the story is the sheep because it got into the boat ready to knit! My favourite part of the story was when the boat sank.  So... do you know who sank the boat??