David Martin Scott Steel, Baron Steel of Aikwood, (born 31 March 1938), is a British Liberal Democrat politician. He began his career in the Liberal Party, serving as the party's final leader from 1976 to 1988. His tenure spanned the duration of the alliance with the Social Democratic Party, which began in 1981 and concluded with the formation of the Liberal Democrats in 1988. Steel served as a Member of the UK Parliament from 1965 to 1997 and as a Member of the Scottish Parliament (MSP) from 1999 to 2003, during which time he was the parliament's Presiding Officer. He has been a member of the House of Lords since 1997 as a life peer.