This comes after the Health and Safety Executive (HSE) reminded restaurants of their legal obligations following complaints from couriers.
McDonald's has apologised to food delivery drivers after they were denied access to its toilets in lockdown.
"We apologise to any courier that has been affected," McDonald's said. "We are sorry to hear that on some occasions this guidance has not been implemented, and we will be reminding our restaurant teams about the policy."
The Health and Safety Executive (HSE) said it had received complaints, suggesting some restaurants were breaching the Workplace (Health, Safety and Welfare) Regulations of 1992.
These laws oblige restaurants to provide toilet access for delivery drivers and washing facilities at "readily accessible places.”
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