It follows widespread claims of a toxic culture of sexual assault and harassment at the fast food chain.
The EHRC entered into a legally binding agreement with McDonald's in 2023 to prevent sexual harassment in its outlets.
But franchisees who run most of the chain's 1400 restaurants in the UK were not covered by the agreement. The EHRC has now written to all of the restaurants, saying they must comply with the Equality Act. EHRC chief John Kirkpatrick's letter, seen by the BBC, says: "It is your duty to ensure any ant...