Shamrock Farm was the United Kingdom's only non-human primate importation and quarantine centre, located in Small Dole, near Henfield in West Sussex.
The animals were held in windowless cabins in the company's 40,000 sq ft (3,700 m2) facility, surrounded by 16 ft-high fences, razor wire, and cameras.
[3] According to Keith Mann, Shamrock also took primates from British zoos and theme parks, including 83 macaques from Longleat, 32 from Woburn Abbey, and several different species from Ravensden and Robin Hill on the Isle of Wight.
The primates were allegedly denied socialization, stimulation, or environmental enrichment, and engaged in stereotypical behaviors, such as continuous rocking, twisting, self-mutilation, and wailing.
[5] The campaign garnered national recognition when footage secretly filmed within the facility by a protester posing as an employee was broadcast on the investigative current affairs programme World in Action.