Lydia Emelda Simmons is a Labour Party local politician in Slough, Berkshire, England who was active between 1979 and 2007. She has the distinction of being the first black person, as well as specifically the first Afro-Caribbean woman, to become a mayor in England. By the end of her tenure as Councillor on Slough Borough Council, she was the longest-serving member of the council. She was born in Montserrat, a small volcanic island in the Caribbean.