Houseboat building in the 60's

Didn't watch it as my data allowance is almost run out but was it *Floating Homes"? I think they converted some old wooden narrow boats and put cabins a bit wider than the boat on top. there used to be one near Hemel Hempstead on the Grand Union when I was a native in that area in the mid 00s. Don't know if its still extant. I think it was called "Jester" or something similar.