In the UK, Uber has some tough competition. Deliveroo, which also offers scheduled orders, is courting small restaurants with a network of small, delivery only kitchens called 'Editions.' Just-Eat, which hoovered up Hungryhouse last December, is still a household name, and Amazon Prime has the might of an e-commerce juggernaut behind it. In the food space, Uber is arguably the challenger. One that's experienced in app development and managing a fleet of drivers, but a challenger nonetheless.

The fight for peckish Brits is the least of Uber's problems, however. The company is losing a bunch of high-profile staff at the moment, including the director of its AI lab. There's also "Greyball," a program designed to deceive government officials from catching Uber cars, and "Hell," an internal program used to identify and track drivers who are using Uber and Lyft simultaneously. Combine that with its self-driving car program, which was part of a crash in Arizona last month, and its ongoing court battle with Alphabet-owned Waymo, and the company has a lot on its plate.