Here are two bridges along the canal. All the bridges are numbered, and it's one-way traffic under them:Sometimes there are more modern lift-bridges. One person has to hop off the boat, cross the bridge, pull on the chain that dangles from the weighted diagonal (hidden behind the tree), which raises the bridge. When the boat has gone through, you can let go (carefully), cross the lowered bridge, and hop back on the boat at the other side.The strategically placed sign points to The Bell in Lower Heyford - pleasant pub in a mellow village (or so it seems on a chilly day).