Margaret Theresa Prosser, Baroness Prosser, OBE (born 22 August 1937) is a Labour life peer and former trade unionist. Prosser was born on 22 August 1937 in Tooting, London, the daughter of Frederick James and Lillian (née Barry) Prosser. She was educated at St Boniface Primary School, Tooting and St Philomena's School, Carshalton. She studied as a mature student at North East London Polytechnic, qualifying with a Post-graduate Diploma in Advice and Information Studies in 1977. She is a director of Progress Limited, a political think-tank and registered charity.