PA
Buckingham Palace, a leading cinema chain and one of Britain's best known art galleries are among a group of high profile employers who sign staff up to so-called "zero-hours" contracts to keep employment costs at a minimum.
Two days after it emerged that retailer Sports Direct employs 20,000 staff on zero-hours terms, the Guardian has established that the royal family's London residence, along with Cineworld and the Tate galleries, hire workers under the controversial employment practice.