"Not sure why you'd want to?" Oh, absolutely! I am completely sure about why I would want to. What gave you the impression that I'm not sure why I want to?
"Maybe its because I live near the broads, but I can't see it being very interesting for narrowboaters?" I don't know how to answer that question. It doesn't make any sense to me. Try re-phrasing your question.
Just to get us back to my original questions, I asked: 1. Is it possible to go from The Wash to Lowestoft? 2. Has anyone ever done it? 3. Is overland transport the only way to connect to the Anglian waterways from the CRT waterways? 4. If so, how much does it cost?