High Quality Content by WIKIPEDIA articles! Greg Avery (born 1963) is a British animal rights activist. He is chiefly known as a founding member of several influential animal rights campaigns — focusing on opposition to the animal testing industry — that have dramatically altered the nature of the animal rights movement in the UK. His latest involvement is with Stop Huntingdon Animal Cruelty (SHAC), an international campaign to force the closure of Huntingdon Life Sciences (HLS), an animal-testing company based in the UK and US. The Guardian describes Avery as the "de facto leader" of SHAC.