I don't think so. There's surely not THAT much money in folk-rock. It's the Manor House, which changed hands only (at a guess) five or six years ago, but which I think had been in the same family for a long time before that.
The "new" people (five or six years ago) spent a lot of money upgrading the bankside, and I think that part of the work involved dredging the first part of the arm. There was a narrowboat moored there for a brief while. But as far as I'm aware it was never opened out all the way to the house.
Local rumour had it that the bankside would be let out as moorings, but that has not happened. Perhaps they didn't want boaters going to and fro across their grounds, which are spectacular.