A United Boeing 777-200, registration N782UA performing flight UA-935 from London Heathrow,EN (UK) to Los Angeles,CA (USA) with 265 passengers and 14 crew, was enroute at FL320 about 280nm northnorthwest of London, abeam Prestwick,SC (UK), when the crew decided to return to London Heathrow, after two passenger seats in Global First Class began to emit sparks due to eletrical issues. The aircraft landed safely back on Heathrow's runway 27L about one hour later, emergency services checked the aircraft before it proceeded to the apron.

The airline confirmed electrical issues with passenger seats as cause of the return.