[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.
[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.