| Honorific-Prefix: | The Right Honourable |
| The Lord Clark of Kempston | |
| Office1: | Member of Parliament for Croydon South |
| Term Start1: | 28 February 1974 |
| Term End1: | 16 March 1992 |
| Predecessor1: | Constituency created |
| Successor1: | Richard Ottaway |
| Constituency Mp2: | East Surrey |
| Term Start2: | 18 June 1970 |
| Term End2: | 8 February 1974 |
| Predecessor2: | Charles Doughty |
| Successor2: | Geoffrey Howe |
| Constituency Mp3: | Nottingham South |
| Term Start3: | 8 October 1959 |
| Term End3: | 10 March 1966 |
| Predecessor3: | Denis Keegan |
| Successor3: | George Perry |
| Birth Name: | William Gibson Haig Clark |
| Birth Date: | 1917 10, df=y |
| Nationality: | British |
| Party: | Conservative |
| Spouse: | Irene Rands |
| Children: | 4 |
| Alma Mater: | Battersea Polytechnic |
| Awards: | Knight Bachelor (1980) |
| Serviceyears: | 1941 - 1946 |
| Rank: | Major |
| Unit: | Royal Army Ordnance Corps |
| Battles: | Second World War |
William Gibson Haig Clark, Baron Clark of Kempston, (18 October 1917 – 6 October 2004) was a British Conservative politician who sat for a total of 28 years as a member of Parliament for three constituencies. He was also a Member of the House of Lords.
Clark was educated at Battersea Polytechnic, qualifying in accountancy in 1941.[1] From 1941 to 1946 he served in World War II in Britain and India in the Royal Army Ordnance Corps, gaining the rank of major. He became involved in business, particularly investing in cane sugar production, with interests in St Kitts and Belize, and in property in the UK. He was also a consultant to Tate&Lyle.[2]
In 1949, Clark was elected to Wandsworth Borough Council, serving until 1953. He was unsuccessful in his attempt to win a seat on the London County Council and stood without success in the 1955 general election in Northampton.
Clark was elected to Parliament for Nottingham South in 1959, serving on the opposition front bench from 1964 to 1966, the only period in his career. He lost his seat in 1966.He returned to Parliament as the MP for East Surrey in 1970, and from 1974 until he retired in 1992 for its largely successor seat after boundary changes, Croydon South. Geoffrey Howe succeeded him in the East Surrey seat when boundary changes meant he was transferred from the Reigate seat close by. He was active in the 1970s in restoring Conservative Party finances to a sustainable levels. He identified with the right wing of the party and voted against British membership of the European Community in 1971. He chaired the Conservative backbench Finance Committee from 1979 until 1992, encouraging Margaret Thatcher to pursue financial stability and free enterprise and defending her policies on television and radio. He was knighted in 1980 and in 1990 was made a Privy Counsellor.[3]
Following his retirement Clark received a life peerage on 21 July 1992 as Baron Clark of Kempston, of Kempston in the County of Bedfordshire, and was an active contributor to House of Lords debates.[4]
Clark was married to Irene Rands and had three sons and a daughter.
| Escutcheon: | Erminois on a pile Azure between two quills pilewise points in roundels in pile of the last. |
| Crest: | A demi-unicorn Azure winged armed crined and unguled Or collared chequy Argent and Azure and supporting with the forelegs a thistle plant flowered Proper. |
| Supporters: | Dexter a lion Gules gorged with a collar chequy Argent and Azure pendent therefrom by a cord Or an escallop Argent and resting the interior hid paw on a portcullis Gold sinister a unicorn Azure winged horned unguled and crined Or gorged with a collar chequy Argent and Azure pendent therefrom by a cord Gold an escallop Argent and resting the interior hoof on a bezant. |
| Motto: | Perseverantia Cum Perceptione[5] |