Frederick Isaac van Mierlo[1] (born 1989 or 1990)[2] is a British Liberal Democrat politician who has been Member of Parliament (MP) for Henley and Thame since 2024.

Before his election to Parliament, van Mierlo worked as a consultant to companies and patient groups.

[4][5] In the 2019 European Parliament election in the United Kingdom, van Mierlo was on the Liberal Democrat party list for North West England.

[11][12] Van Mierlo stood as a Liberal Democrat parliamentary candidate in the Lancashire constituency of Fylde at the 2015 and 2017 general elections.

[4] He is a distant relative of Hans van Mierlo, a co-founder of the Dutch liberal party Democrats 66.