The in house canal network operated until the 1940's when a last, and very utilitarian aqueduct was built to link up to a new mixing house. Newer is not always better and this structure, a simple concrete channel sat atop a row of concrete pipes has long since vanished.
26, hmm. Thats quite a big number. I wonder where all the rest are? More hunting needed.
The photos are courtesy of www.londoncanals.co.uk