A United Airlines plane was forced to make an emergency landing at Heathrow Airport following reports of smoke in the cabin.
Emergency services rushed to the United Airlines flight UA949 where police and fire crews stopped the plane on the taxiway.
The plane took off at 12.23pm from Heathrow and had been due to fly to San Francisco.
It was reported that the plane stopped climbing at around 15,000 feet after leaving the airport.
The Boeing 777-200 aircraft was over Milton Keynes when it made a U-turn to return to Heathrow, where it was escorted to the gate by three fire engines.
The return to London was reportedly due to a technical fault.
Heathrow Airport confirmed the plane landed safely and there was no wider impact on operations.
The same aircraft declared an emergency on approach to San Francisco due to an engine issue seven days ago, AirLive reported.
Jerry Dyer from Big Jet TV, who was filming at Heathrow when the plane returned back to the airport, told Metro that there was no smoke when the place landed ‘safely.’
He said the plane had used a general emergency code, which could be anything from ‘minor technical issues to a problem with a passengers like a health issue.’
Jerry praised the emergency services, the plane crew and Heathrow for their response, saying the fire engines and ambulances were already on the tarmac as a precaution.
In a statement on its website, United Airlines said: ‘We’re sorry for returning to London Heathrow.
‘Our maintenance team needs to evaluate a technical issue on your plane before we depart again. We appreciate your patience, and we’ll keep you updated as we get more information.’
The flight has reportedly now been cancelled.
The airline has been contacted for further comment.