Fast food , super market chains rely on mega farms
The Bureau of Investigative Journalism established that many UK supermarkets and fast food chains buy from companies operating US style mega farms including :
Tesco,
Ocado,
Sainsbury’s,
Co op,
M&S,
Morrisons,
Asda,
Alidi,
McDonalds
Burger King
Nando’s
Hook 2 Sisters
 “…a joint venture between PD Hook and 2 Sisters Food Group It operates farms that supply birds to 2 Sisters Food Group whose customers include Tesco, Morrison’s, Sainsbury’s, M&S, and Asda Data shows that Hook 2 Sisters operates 37 Cafo sized facilities across the UK” 
Faccenda Foods
“… supplies poultry to Asda and Nando's, among others, operates 26 Cafos in the UK “ 
Moy Park
 “supplies Asda, McDonalds and Burger King, has 19 Cafos across the country” 
JSR Farms
 “which rears pigs, says it is in partnership with Sainsbury’s and Morrisons, and operates 4 Cafos, according to our analysis J C Lister, another major pig producer, operates 2 Cafos and reportedly has supplied Tesco, Co op and Aldi” 
Pawton Dairy
A large Cafo sized farm called supplies milk to Arla Arla butter and cheese are sold in Co Op 
Definition of Cafo
To meet the definition of a Cafo, a facility must have at least 125 000 broilers (chickens raised for meat), or 82 000 layers (hens which produce eggs) or pullets (chickens used for breeding), or 2 500 pigs, 700 dairy cattle or 1 000 beef cattle 
