Matthew Collins is an activist and author born in London in 1972.^[1] He was a member of several British fascist and neo-Nazi organizations, before starting to work as an informant for an anti-fascist magazine. He later became an activist for anti-fascist and anti-racist campaigns.

In his youth, Collins was the South London organizer for the National Front, a volunteer for the British National Party’s head office and a member of the neo-Nazi organization Combat 18.^[2]

Collins took part in the Battle of Welling after which he became a mole for the anti-fascist Searchlight magazine. Collins was paid in book tokens for his role as an informant.^[1] When his role as a Searchlight informant was exposed, Collins went into hiding in Australia

He returned to the UK as the subject of a BBC documentary Dead Man Walking (2004).^[1]

In 2012, Collins wrote a memoir of his youth, entitled Hate: My Life in the British Far Right which included a foreword by Billy Bragg.^[3]

Matthew Collins is currently a researcher and Head of Intelligence for the anti-fascist and anti-racist campaign group Hope Not Hate.^[4] Hope Not Hate is described as a non-sectarian, nonpartisan third party organisation.^[5] He manages Hope Not Hate's intelligence network.^[6]

Collins managed Robbie Mullen, a mole in National Action, in foiling a plot to murder Labour MP Rosie Cooper in 2017.^[7] In 2019, Matthew Collins wrote his second book, Nazi Terrorist: The Story of National Action with Robbie Mullen,^[8] and in 2022, he wrote his third book, The Walk-In: Fascists, Spies & Lies - The True Story Behind the ITV series, with a foreword by political journalist Kevin Maguire associate editor of the Daily Mirror newspaper.

Collins is played by the actor Stephen Graham in the ITV television drama series The Walk-In broadcast in Autumn 2022.^[9] He appeared in the documentary Nazi Hunters: The Real Walk-In which was broadcast after the final episode.^[10]