Uber, the multi-national tech company that runs a ride-hailing mobile app, has not had its licence to operate in London renewed.
Transport for London (TfL) says it identified "several breaches that placed passengers and their safety at risk".
Sky News looks at what happens in the immediate aftermath of the decision, and the impact on the app's users.
How does Uber work?
The app allows users to request taxi journeys from drivers who have signed up to operate on its behalf.
Drivers do not work for Uber, but instead use the platform to connect to passengers who need a lift.
Passengers simply request a journey through the app, and using their phone's location, drivers are able to accept requests or decline them.
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Uber then tracks the journey, and deals with the payment direct from the passenger to the driver, taking a commission for every journey.
Why has Uber been stripped of its operating licence in London?
TfL says it does not have confidence in the company, particularly around passenger safety.
It claims that some of the drivers using the app could be uninsured and unlicensed.
Uber had previously been given several months to make changes to the way it operates, including auditing its drivers, and the 25 November deadline comes at the end of a two-month extension.
The ride-hailing app firm's existing licence expires at 11.59pm, but it will be allowed to continue to operate pending an appeal.
Will I still be able to order an Uber in London after midnight tonight?
Even though Uber's licence will expire at 23.59, the company is planning on appealing TfL's decision not to renew it.
TfL made it clear in its statement that the tech giant could continue to operate in the capital during the appeal process.
Uber said it will "continue to operate as normal" – so users should not see a change in its service.
What are the chances of Uber being allowed to continue to operate in London?
It is difficult to say what the end-game will be for the ride hailing app but Uber has been operating continuously in London since 2012.
The company says it remains committed to working with TfL on a solution.
TfL has imposed a number of conditions on the tech-giant, mainly around ensuring the safety of passengers, which will help secure its future.
So, Uber could eventually see its permanent licence renewed if an agreement can be reached.