Kevin T of NB Tranquility got it. It is the breather for the ground paddles on a lock on the Huddersfield Narrow Canal. The pepperpot-shaped device seems to serve as a bollard or strapping post too.
This is at Lock 12W.
Rain - It’s the Cosgrove Canal Festival this weekend and we’ve never been, so Adrian went up to the boat yesterday evening. I’m working a set of night shifts. T...
16 hours ago