Simon Anthony Hart (born 15 August 1963)[2][3] is a British Conservative politician who served as the Member of Parliament (MP) for Carmarthen West and South Pembrokeshire from 2010 to 2024.

He served as the Chief Whip of the House of Commons and Parliamentary Secretary to the Treasury from October 2022 to July 2024.

In December 2019, during the formation of the second Johnson ministry, Hart was promoted to the Cabinet as Secretary of State for Wales, succeeding Alun Cairns who had resigned from the position the previous month.

[11] He actively campaigned in May 2013 to overturn the 2004 Hunting Bill and assist the National Farmers Union of England and Wales.

[13][14][15] Despite voting Remain in the 2016 European Union referendum,[16] Hart has consistently argued that the result must be honoured and the UK must leave the EU.

[17] At the snap 2017 general election Hart was again re-elected, with an increased vote share of 46.8% and a decreased majority of 3,110.

[23] On 27 July 2019, in Boris Johnson's administration, he was promoted to Parliamentary Secretary at the Cabinet Office, with responsibility for policy implementation.

[31] Following the 2019 general election, Hart was appointed Secretary of State for Wales by Prime Minister Boris Johnson,[32] replacing Alun Cairns.