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.
Abingdon to Oxford - *Tue 12th Sep* Abingdon to Rose Isle After a great weekend in Abingdon, and a wet Monday, we decided to head for Oxford. As we set off upstream, we start...
13 hours ago