Guy Rhys John Mansfield, 6th Baron Sandhurst, KC (born 3 March 1949), is a British barrister, hereditary peer and Conservative member of the House of Lords.

He served as Chairman of the General Council of the Bar in 2005.

[1] He is the current Chairman of Research for the Society of Conservative Lawyers.

[2] Lord Sandhurst was elected as a member of the House of Lords on 17 June 2021 in a Conservative hereditary peers' by-election.

[4] He made his maiden speech on 14 September 2021 during the Crime, Police & Sentencing Bill.