They interviewed Peter Altounyan, who is Roger's son from the original family that inspired the book. The photograph below was taken at the south end of Coniston Water where the programme was filmed. This is also the real location of the River Amazon and Octopus Lagoon from the book, which are really the start of the River Crake and Allan Tarn, which are behind Kathleen's mast. The jetty is used by the steam gondola to drop and pick up passengers.
The water is shallow here and it is easy to anchor (the new folding anchor worked fine in this situation) or land for a spot of lunch, it is also where a yellow Scaffie can clearly be seen. A relative has recently published a book of poetry and includes one title "Swallows and Amazons Lost Forever" which included the line:
Adventure drowned with life jackets and the obligatory adult
This some how described so well our current obsession with H&S. I know not all will agree.