It’s got a lot of details wrong… it took us five real years (plus one fake pandemic one) to visit every nook and cranny, and they’ve implied things are navigable that sure as heck aren’t — just try and get on the Dee from Chester without a crane except in a lethally high flood, the lock was disassembled years ago — and unnavigable that definitely are (it’s got the Manchester Ship Canal on there, but not the Mersey we crossed to get to it).