Ok this may not be totaly true but after being on the comitte for the thorne and district aa and talks with the local EA baliff here goes.
When a club gets the fishing rights for a section or sections on the canal the fishing rights and rights of way are for one bank only, but that said if a section or part of a section has no access or there may be a boat yard ect then that section or part of may be on the other bank to the rest.
So to anwser your question i would say no the land owner does not have the fishing rights, that said if the club bailiff comes and your on the other bank there is not a lot he can do as he only controls the one bank, although round our parts they try to tell you to pack up or charge a day ticket. Doncaster aa have tryed to get round this by stateing they have control of any bank were there is access and a book or day ticket is needed.
Sorry for the bad spelling.
Lee