The UK was a bright spot within the American group’s international business, which saw comparable sales growth of 5.7pc for the three months to September 30.

Mr Pomroy said its self-order app, where customers can order on their mobile device, then click and collect from the counter, had also proved popular and was live in over 900 restaurants.

He added that by the end of the year all of its 115,000 staff would have been offered the choice between a flexible contract and a fixed one offering minimum guaranteed hours. The overture comes just two months after McDonald’s faced the potential of strikes at two of its British outlets partly because of a row over zero-hours contracts.