McDonald's UK boss has expressed shock and apologised after more allegations of sexual abuse emerged following a BBC report on Tuesday.
Alistair Macrow, chief executive of McDonald's UK and Ireland, told the BBC the claims were "personally and professionally shocking, adding that the company had “clearly fallen short” in a number of areas.
More than 100 existing and former staff, many of them teenagers at the time, have alleged they were subjected to sexual assault, harassment, racism and bullying.
The fast food chain will also look at the process of how complaints are escalated to other departments or more senior managers.
Macrow said: "It is crucial that people feel safe and able to speak up.
"Clearly this has not been the case in some parts of our business."
"Any substantiated breaches of our code of conduct will be met with the most severe measures up to, and including, dismissal."
Most of the chain’s outlets in the UK are run as franchises, which means staff are employed by the operator of the outlet, not the group itself.
In the UK, McDonald’s had 170,000 people working in 1,450 restaurants.