British Airways engineers are examining a 747 that had to return to Heathrow after experiencing a "minor technical problem" less than three hours into its flight to Hong Kong.
A British Airways spokesman said: "One of our aircraft experienced a minor technical problem and because of that returned to Heathrow as a precaution.
"Nobody was in danger at any point.
"At the moment our engineers are examining the aircraft. The exact nature of the fault is being looked at."
The flight - BA 0025 - had just started on its 12-hour journey when the problem was spotted.
More top news
It follows interventions from Sir Elton John and US chat show host Ellen DeGeneres.
Former pensions minister Ros Altmann has condemned a proposal to raise the pension age to 75.
Nick Adderley said Tasers could save the lives of officers.