Pardon The Expression (Season 2 - Ep.3) The Resignation (1966)

First broadcast: 24th January 1966

Plot (From Corriepedia)
Walter Hunt is visited by Chairman Brigadier Hawk who drops hints to Hunt as to the reason why he has not been invited to the next manager's meeting. Knowing from past experiences of his colleagues that this is a prelude to being fired, he writes an abusive resignation letter to Hawk letting him know in no uncertain terms what he thinks of him, Sir Charles Dobson and the firm itself. He is then shocked to hear from Miss Cavendish, Hawk's domineering secretary that the reason he has not been invited to the meeting is so that his colleagues can discuss what to get him to mark his twenty-five years with the firm. The problem is that Leonard Swindley has already taken the letter to be posted. Stopped in their attempts to retrieve the letter from a postbox by a passing policeman, Hunt and Swindley travel down overnight to London and attempt to get the letter from Hawk's desk before he arrives for work. Thinking they have the letter, Swindley rips it up and deposits the remains in a flowerpot, only to find that the real letter is still in his own pocket (and was never actually posted) and that the missive that he has destroyed is a cheque for the chairman for over four thousand pounds...