The series was based on a stage play "The Banana Box", by Eric Chappell in which the role of the landlord, called Rooksby at that time, was initially played by Wilfrid Brambell before Leonard Rossiter took over later in the play's run.
The original name of Leonard Rossiter's character was Rooksby. This was changed to Rigsby after complaints and threats of legal action from a real-life Mr. Rooksby who objected to the unflattering portrayal of a character with the same name as him.
Rupert Rigsby: [Describing the state of the nation]
This country gets more like the boiler room of the Titanic every day. Confused orders from the bridge, water sloshing around our ankles. The only difference is they had a band.