I’ve been watching the YouTube videos from ‘Minimal List’. Over the past 4 years or so they have managed to get around all the connected canals and rivers in England and Wales and are currently posting the last few vlogs of their journeys from the Great Ouse, which they absolutely love. They are on record in saying it’s one of their favourite waterways. They obviously haven’t done the Broads, though they do mention that part of the attraction of the Gt Ouse is the lack of river traffic.