British canals are smaller than you imagine, and were even when they were commercial waterways. The standard lock widths are only 7ft or 14ft (2.1m/4.3m) so the boats are narrow, proportionally long, and very small compared to a Rhine barge or something.
As with the railways, we built early, to a small gauge, and lived with the consequences of that later.
As with the railways, we built early, to a small gauge, and lived with the consequences of that later.