Nick Kollerstrom, a former honorary research fellow at University College London, was sacked in 2008 after it emerged he was engaging in Holocaust denial. In an article entitled “the Auschwitz ‘Gas Chamber’ Illusion”, Kollerstrom claimed that although there were gas chambers at Auschwitz these “were operated for purposes of hygiene and disinfection, in order to save lives and not take them”.

Thanks to his links to fellow Holocaust denier Michèle Renouf, Kollerstrom provided an interview to the Iranian English-language channel PressTV, and an article headlined “The Walls of Auschwitz: A Review of the Chemical Studies” which was uploaded to the PressTV website, in which Kollerstrom claimed that the gassing of the Jews was “scientifically impossible”.

He has also written that “[There was] never a centrally-coordinated Nazi program of exterminating Jews in Germany. Lethal gas chambers did not function in German labour-camps, that’s just an illusion” and “Let us hope the schoolchildren visitors are properly taught about the elegant swimming pool at Auschwitz, built by the inmates, who would sunbathe there on Saturday and Sunday afternoons while watching the water polo matches.”

In 2014, he released the book Breaking the Spell: The Holocaust: Myth and Reality, published by Germar Rudolf’s Holocaust denial publishing house, Castle Hill Publishers.

Kollerstrom went on to be a key figure in the London-based conspiracy theory discussion group Keep Talking, which has itself hosted a variety of Holocaust deniers and antisemites, along with other fringe beliefs. In addition to Holocaust denial, Kollerstrom has published books pushing conspiracy theories about the 7/7 London bombings, the supposed death of Paul McCartney, 9/11, and Ukraine.

Though his conspiratorial works continue to be circulated amongst the Holocaust denial and conspiracy theory scene, Kollerstrom himself is barely active. In 2025 he contributed an article titled ‘Ancient Units of Measure That Shouldn’t Exist’ to a website called Ancient Origins, appeared on the Sheep Farm Podcast and little else.