Question: do they ever show sheridan on keeping up appearances

Answer: No, An unseen character, Sheridan is Hyacinth and Richard's spoiled and selfish only son, about eighteen years of age. He is away at college (a poly which Hyacinth insists is of a ``university standard'' - the first three series were written prior to the Further and Higher Education Act 1992) and is known to audiences primarily through Hyacinth's telephone conversations with him. The major running gag surrounding Sheridan involves him ringing home whenever he needs money, Hyacinth without fail assuming at first that he is ``just ringing his mummy'' - despite his age, she still refers to herself and Richard as ``mummy and daddy.'' Most of the time, he needs money for ludicrous things that his ``friend'' Tarquin has suggested, up to and including a walking holiday in Iceland. Although Sheridan usually convinces Hyacinth of his need for the money (much to Richard's exasperation), Hyacinth is very occasionally able to say no, and she too sometimes becomes frustrated with his constant demands for money. Although Hyacinth claims Sheridan writes to her constantly, and often expects to receive letters from him, Sheridan never gets in touch unless he wants money. Sheridan and Richard clearly do not get on: Sheridan prefers not to talk to Richard and has been known to pretend to be someone else whenever he calls and Richard answers the phone. The other running gag is that Richard suspects Sheridan is gay, something which is implied through his love of needlework, his lilac car, desire for pure silk pyjamas, and his male friend, Tarquin. Richard regularly tries to raise the issue with Hyacinth, only for her to remain totally oblivious. A glimpse at the back of Sheridan's head can be seen in the episode ``Let There Be Light'' while he is in a taxi, and during the opening credits, a photograph of him as a young boy is seen on Hyacinth's writing desk; this is the closest he has ever been seen on the show.