During the summer NAH started a new volunteer role with the Kennet and Avon Canal Trust who provide narrowboat trips from their headquarters in Devizes. When our niece and nephew came to stay, we took them to see what he gets up to these days.
I was surprised to find a whole plant community thriving in one of the lock gates we went through. These plants are likely to get a thorough soaking many times a day when boats go through the lock as the water level rises then falls.
The stones lining the top of the lock have thriving mini communities too.