Keith Mann is a British animal rights campaigner and writer, widely considered to be "at the top of the Animal Liberation Front pyramid." Laville, Sandra. blank">"ALF extremist stands by call to flames", The Guardian, June 25, 2005. He is the author of From Dusk 'til Dawn: An Insider's View of the Growth of the Animal Liberation Movement (2007).

_Benjamin Zephaniah writes that Mann is viewed as a cause célèbre within the global animal rights movement. Zephaniah, Benjamin, foreword, in Mann, Keith. From Dusk 'til Dawn, Puppy Pincher Press, 2007. He first came to widespread public attention in 1994, after being sentenced to 14 years imprisonment for setting meat lorries on fire, one of the longest sentences to be handed down to an animal rights activist. Mann escaped from Stretford prison, and was later found at an animal sanctuary run by model Celia Hammond, who had unwittingly given Mann and his girlfriend jobs at the sanctuary, unaware that they were on the run.

In an interview with The Guardian in 2005, Mann advocated a "turn to extremism" by the movement. "I would prefer that we could change things using legitimate methods that are there for changing the world," he said. "But the government have taken away their right to protest and driven people to the kind of tactics that are more productive. It is more useful to sabotage property ... All that is left now is to turn to extremism."