LONDON, July 30 (Reuters) - A radar-related technical issue in Britain's air traffic control system disrupted flights for over four hours at major airports in London and elsewhere on Wednesday, though the issue was later resolved and departures were resuming.

Heathrow, Gatwick, London City, Birmingham, Edinburgh and Manchester Airports were all among the airports hit by the outage that left many aircraft and flight crew out of position. Take-offs for thousands of passengers were cancelled because inbound flights had turned back.

A company that provides air traffic control services said it had resolved a “technical issue.” The delays came months after a power outage forced Heathrow Airport to shut down for 16 hours.