Sunday May 28
1.10pm: British Airways has cancelled a number of flights departing from Heathrow.
The 13.15 to Athens, and 13.20 flights to Glasgow, Stockholm and Dublin are all delayed.
13.25 flights to Paris and Oslo have been cancelled, as well as the 14.00 to Toulouse and the 14.05 to Madrid.
There are some delays at Gatwick, but there are currently no cancellations on the departure board.
The BBC reports that between 6am and 11am today, 36 of the 143 BA flights scheduled to depart Heathrow were cancelled.
12.00pm: BA departures from Heathrow appear to be resuming.
The 11.50 to Thira is currently closing, however a flight to Stavanger at the same time is cancelled.
11.55 flights to Aberdeen and Glasgow have been delayed to 13.15 and 13.58 respectively, however flights to Bahrain and Dallas are scheduled to depart on time.
At Gatwick, the 11.35 Limoges took off eight minutes late, however all BA flights scheduled in the next few hours are set to take off on time.
However, a look at the Heathrow departure board shows that five of the next 10 BA flights are either cancelled or delayed.
Passengers have been advised to check the status of their flight before travelling to the airport.
Heathrow and Gatwick are providing updates on their websites, as is BA.com
Customers who do not have a confirmed booking for travel have been urged not to travel to the airports.
Those who are due to fly today or tomorrow have been given the option of rebooking their flights up to and including June 10.
BA has issued an apology to customers who were left stuck in airports without replacement travel plans yesterday.
Many were reportedly told that they were unable to rebook flights because of the system failure, with some forced to pay hundred to fly with other airlines.
“They don’t automatically rebook you. You have to try to rebook yourself…and if you book with another airline there is no refund. I’ve been deciding whether to sleep in the car,” Fiona Lancaster, 49 from Essex, told the BBC.
The airline has said that it will refund or rebook those who were affected yesterday and will reimburse passengers for food, transport and accommodation costs.
“We are extremely sorry for the significant levels of disruption caused to customers and understand how frustrating their experiences have been,” the airline said in a statement.
“Affected customers can claim a full refund or rebook to a future date for travel up until the end of November 2017.
“Customers are urged to keep any food, transport or accommodation receipts and can make a claim in due course through our Customer Relations teams.”
Many of those who managed to fly did so without their luggage, and have been told that they will be reunited with their bags via courier, free of charge.
The GMB union has suggested that the systems crash could have been avoided if IT work had not been outsourced.
A BA spokesman denied this, and said: “We would never compromise the integrity and security of our IT systems.
“IT services are now provided globally by a range of suppliers and this is very common practice across all industries and the UK Government.”
BA’s chief executive Alex Cruz has said that the root cause of the failure is believed to be a power supply issue, quelling fears of a cyber attack.
