The Diageo Staff Association was a small trade union in the United Kingdom.
The union was founded in 1965 as a staff committee at the Guinness brewery in Park Royal, London.
Originally named the Guinness Brewing Staff Association, it gained a Certificate of Independence in 1979, when it had only 136 members.
[1] It was renamed the Guinness UDV Staff Association in 1998, when it also affiliated to the Trades Union Congress (TUC).
[2] By 2009, its membership had fallen below 400, and it was the smallest union affiliated to the TUC.