Its really good, no script or rehearsals, just natural chat, and seeing places you probably never see.
I used to convert the barges where I worked to houseboats in my teens+.
Most of them came from Kellogg that used to transport the corn etc down the Stretford canal in Manchester docks.
## I love the show but I do wonder if they'd do it with the support of the producers and camera/sound crew. ##
I would imagine so hc, as he is 85 & she is 83, they would probably have someone to cook as well as the laundry, and maybe they stay in a 5 star hotel overnight :-)