Might that be more about Fawlty himself? From what I recall of British television, it would not be unusual to have breasts and bums bouncing around your TV screen after a certain hour.

Here's a little analysis from the Guardian, for which I did have to brave the search term BBC:

https://www.theguardian.com/tv-and-radio/tvandradioblog/2016/feb/02/flashing-the-flesh-a-history-of-tv-nudity-penis-mr-darcy