Dunt was born in Guatemala and grew up variously in Chile, Winchester, and Southampton. Dunt studied Philosophy at University College London, then got an MA from University of Warwick in International Relations followed by a Diploma in Journalism and Media Law from London School of Journalism.
Dunt began his career as a political analyst for Yahoo!, before becoming Political Editor of Erotic Review, a position he held until January 2010, when he became editor of politics.co.uk.
In May 2017 Dunt was part of the team that launched Remainiacs, a political podcast about Britain’s departure from the European Union, as seen from a pro-Remain perspective. In January 2020 the same team launched The Bunker, a podcast similar in format that discusses political issues other than Brexit.