Derek James Fowlds (2 September 1937 – 17 January 2020) was an English actor. He played "Mr Derek" in The Basil Brush Show (1969–1973), Bernard Woolley in the sitcom Yes Minister (1980–1984) and its sequel, Yes, Prime Minister (1986–1988), and Oscar Blaketon in Heartbeat (1992–2010). (Via Wikipedia)