British Airways is continuing to work to restore its computer systems after a power failure allegedly caused major disruption for thousands of passengers worldwide.
The BBC reports that the airline is "closer to full operational capacity" after an IT power outage resulted in mass flight cancellations at Heathrow and Gatwick.
Thousands of passengers remain displaced, with large numbers sleeping overnight in terminals.
BA has not explained the cause of the power outage.
So far on Monday, 13 short-haul flights at Heathrow have been cancelled.
Chief executive Alex Cruz has posted videos on Twitter apologising for what he called a "horrible time for passengers".
No-one from the British Airways has been made available to answer questions about the system crash, and it has not explained why there was no back-up system in place.
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