Collett featured on a Channel 4 propaganda documentary against the BNP - Young, Nazi, and Proud broadcast in 2002. He declared his admiration for Adolf Hitler, unaware he was being filmed. Collett was sacked from his position in the party and expelled days after the broadcast. However he was allowed to rejoin a few days later with chairman Nick Griffin saying that he must change his views on the subject, and was Director of Publicity for the Party before being suspended from the party in early April 2010. During the same month it was reported that he had been investigated by police for making threats against party leader Nick Griffin. His membership was reinstated just one week later, on the orders of the Party's National Chairman Nick Griffin. Despite the reinstatement of Collett's party membership he did not stand for the party in the May 2010 general election.
In September 2019, Collett founded the nationalist group Patriotic Alternative.
- The Fall of Western Man (2017)
- Patriotic Alternative
- Mark Collett at Bitchute
- Mark Collett at Gab
- Mark Collett at Odysee
- Mark Collett at Telegram