Three heads of navigation all visited in the same afternoon by the same two narrowboats:
1. This is the current head of navigation, but work is underway to extend navigation beyond the bridge. Where is it?

2. This also used to extend a short distance further. Where is it?

3. This is the physical head of navigation, but actually a short distance beyond the legal head of navigation. Where is it?
And one further clue:
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This is the means of opening the top gates on the nearest lock to three locations pictured above. What is the name of the lock? (It has two alternative names). |
Click here for the answers.