Just Eat, which itself was bought by Dutch online food delivery platform Takeaway.com earlier this year, said it was “concerned by the very sudden U-turn” by the Competition and Markets Authority.

The watchdog launched an investigation into the deal last December after suggesting it could reduce competition in the UK food delivery market – a sector in which Deliveroo competes primarily with Just Eat and Uber Eats.

But the CMA provisionally gave the deal the green light last month after warning that Deliveroo could have gone bust during the coronavirus crisis without the additional funding.