Martin Charles Horwood is a British Liberal Democrat politician who represented South West England in the European Parliament from 2019 to 2020. He previously served as the Member of Parliament for Cheltenham from 2005 to 2015.

Cheltenham is a constituency in Gloucestershire represented in the House of Commons of the UK Parliament since 1832. As with all constituencies, it elects one Member of Parliament (MP) by the first past the post system of election at least every five years. Since 2015, its MP has been Alex Chalk, who was appointed Secretary of State for Justice in 2023.