Dame Mary Drummond Corsar, DBE (née Buchanan-Smith; 8 July 1927 – 12 August 2020),[2] was a Scottish activist and philanthropist.

She was chairperson of the Women’s Royal Voluntary Service from 1988 to 1993 and noted for modernising the organisation.

[1] Corsar was appointed Dame Commander of the Order of the British Empire (DBE) in 1993.

[3] She was born 8 July 1927, as Mary Drummond Buchanan-Smith, daughter of the Life-Peer Lord Balerno,[4] soldier and geneticist, who was Deputy Chairman of the Unionist Party in Scotland 1960-63.

[3] She married 25 April 1953, Colonel Charles Herbert Kenneth Corsar, LVO, OBE, TD (1926-2012), Vice Lord-Lieutenant of the District of Midlothian 1993-97, by whom she had issue, two sons and three daughters.