A British Airways aircraft taxies on a runway. File Photo/AFP
British Airways said on Monday it has been forced to cancel almost all its flights from UK airports on the first day of a strike by pilots.
"After many months of trying to resolve the pay dispute, we are extremely sorry that it has come to this," BA said in a statement.
The airline said it remains willing to return to talks with the British Airline Pilots Association (BALPA).
"Unfortunately, with no detail from BALPA on which pilots would strike, we had no way of predicting how many would come to work or which aircraft they are qualified to fly, so we had no option but to cancel nearly 100 per cent of our flights."
The UK flag carrier and its 4,300 pilots have been locked in a nine-month pay dispute that could disrupt the travel plans of nearly 300,000 people.
Pilots are to continue their strike on Tuesday and are threatening to strike for one more day on September 27 -- and then possibly again closer to the winter holidays -- should the dispute rage on.
BALPA has rejected a pay increase of 11.5 per cent over three years that the airline proposed in July.
BA says the offer would see flight captains receive "world-class" pay and benefits of around £200,000 ($246,000 or 220,000 euros) a year.
It also points out that two other unions representing 90 per cent of the airlines' workers have accepted the 11.5-per cent raise.
BALPA counters that co-pilots' salaries average around £70,000 – and that of junior ones drops down to just £26,000.
This leaves some in heavy debt since they must first undergo training that the BBC estimates costs around £100,000.
BALPA also points to a nearly 10-per cent jump in pre-tax profits reported by BA's parent company IAG last year.
Reports suggested at least 18,000 passengers were grounded after the services in and out of Gatwick and Heathrow — Britain's busiest airports – were cancelled.
The airline says a "systems issue" is causing delays and cancellations Wednesday for short-haul flights from Heathrow, Gatwick and London City airports.
The airline said it was "surprised and disappointed" by the penalty from the Information Commissioner's Office (ICO), the BBC reported.
The Coromandel Express, which runs from Kolkata to Chennai, derailed and fell on the opposite track, with many people still trapped, the reports said.
Sheikh Mohammed added in a tweet on Twitter: "We found its executive director at the service counters, receiving customers, speeding up procedures, and contributing to clearing transactions. The secret shopper assured us that providing the service did not exceed five minutes."
The first lady arrived in Cairo from Amman, where she attended the wedding of Crown Prince Hussein. She is travelling to Morocco on Saturday before heading to Portugal, the final stop of her tour, on Monday.