<Tr> <Th> Original release </Th> <Td> 4 September 1990 (1990 - 09 - 04)--2 November 1992 (1992 - 11 - 02) </Td> </Tr> <P> On the Up is a British situation comedy written by Bob Larbey . It ran for three series, from 4 September 1990 to 2 November 1992 . </P> <P> Tony Carpenter is a self - made millionaire who turned his South London minicab firm into a successful chauffeur - driven car service . He lives in a large detached mansion in Esher, surrounded by Rolls Royces and BMWs, with a domestic staff who respect him, and who he adores; Witty and insolent butler / driver Sam (who is also a childhood friend of Tony), acerbic secretary Maggie and cook Mrs Wembley (responsible for the series' catch - phrase of "Just the one", used to respond to the offer of a sherry even if it was her third or fourth). </P> <P> Despite all these advantages, Tony's life is full of conflict: </P>

Where does the saying just the one mrs wembley come from
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