At the time of broadcast, Palmer distanced himself from Harry by declaring himself to be conservative with a small 'c' and apolitical. He said that he loved the character in spite of this though.
When publicising the first series in 1984, Nobbs was at great pains to stress that Fairly Secret Army was not simply a spin-off but a series in its own right.
Although not officially connected with The Fall And Rise Of Reginald Perrin, some ideas and dialogue from that series are used again in this sitcom. For example, the second episode of the first series contains a new version of the famous 'forces of anarchy' speech with Nancy taking over Reginald Perrin's role.