A closer look in pictures of the UK's deepest canal lock in Calderdale which needs a new keeper
Calderdale is home to deepest canal lock in the whole of the UK and you now have the chance to work on it.
National waterways charity, the Canal and River Trust is urgently seeking volunteers to take on the iconic role of lock keeper at Britain’s deepest lock. We take a closer look at the structure and what makes it so special.