Robert Maclennan, Baron Maclennan of Rogart

The Right Honourable The Lord Maclennan of Rogart PC
Official portrait, 2018
President of the Liberal Democrats
In office 1 January 1995 – 31 December 1998
Leader	Paddy Ashdown
Preceded by	Charles Kennedy
Succeeded by	Diana Maddock
Acting Leader of the Liberal Democrats
In office 3 March 1988 – 16 July 1988 Serving with David Steel
Preceded by	Position established
Succeeded by	Paddy Ashdown
Leader of the Social Democratic Party
In office 28 August 1987 – 16 July 1988
Preceded by	David Owen
Succeeded by	Position abolished
Parliamentary Under-Secretary of State for Prices and Consumer Protection
In office 4 March 1974 – 4 May 1979
Prime Minister	Harold Wilson James Callaghan
Preceded by	Position established
Succeeded by	Position abolished
Member of the House of Lords Lord Temporal
In office 19 July 2001 – 18 January 2020 Life peerage
Member of Parliament for Caithness, Sutherland and Easter Ross Caithness and Sutherland (1966–1997)
In office 31 March 1966 – 14 May 2001
Preceded by	George Mackie
Succeeded by	John Thurso
Personal details
Born	Robert Adam Ross Maclennan (1936-06-26)26 June 1936 Glasgow, Scotland
Died	18 January 2020(2020-01-18) (aged 83) London, England
Political party	Labour (before 1981) SDP (1981–1988) Liberal Democrats (1988–2020)
Spouse	Helen Cutter Noyes ​ (m. 1968)​
Children	2
Alma mater	Balliol College, Oxford Trinity College, Cambridge Columbia University

Robert Adam Ross "Bob" Maclennan, Baron Maclennan of Rogart, PC (26 June 1936 – 18 January 2020) was a British Liberal Democrat politician and life peer.

He was the last leader of the Social Democratic Party (SDP), serving during the negotiations that led to its merger with the Liberal Party in 1988. He then became joint interim leader of the new party, known as the Social and Liberal Democrats (SLD) and later as the Liberal Democrats. He served as a Member of Parliament (MP) from 1966 to 2001, when he was elevated to the House of Lords.