British Airways has apologised for the disruption to flights

More than 90 flights have been cancelled since Monday due to staff shortages and technical problems.

A spokesman for BA admitted the airline cannot rule out further disruption over the Bank Holiday weekend.

BA chief executive Rod Eddington has admitted the company "got it wrong" after the cuts that have left thousands of passengers stranded.

"Clearly we did get it wrong because we didn't have enough people in the terminal on Monday," he said on Wednesday.

We let ourselves down ... our customers and our own people BA chief executive Rod Eddington What caused travel chaos?

"We know we're short-handed in the terminals. We've got 200-plus people in the training system to address that, but yes, we let ourselves down on Monday night, our customers and our own people."

The flights cancelled on Thursday were return trips to Oslo, Zurich and Amsterdam as well as one from Baltimore to Heathrow.

Some passengers had been able to take later flights, but others were facing delays until Thursday evening.

More cancellations

A BA spokesman said there was no way to predict what the situation would be like over the weekend, but stressed that flight schedules were under continuous review.

The airline has warned services may be "merged" in coming days to cope with the problems.

"If we need to do this the changes will be made well in advance of the departure time to minimise the disruption to our customers," the spokesman added.

Thousands of passengers were left stranded after cancellations

BA office staff have been asked to volunteer to work in the terminals over the weekend, including Mr Eddington and 11 other directors.

The disruptions began on Monday when BA ditched 50 flights from Heathrow due to technical problems with some transatlantic aircraft and staff shortages.

The knock-on effect of having planes and crews in the wrong place resulted in a further 31 cancellations at the airport on Tuesday.

Another seven were cut on Wednesday, prompting BA's director of operations Mike Street to apologise to passengers.

"It was a miserable time for them, we let them down and once again on behalf of BA we're all extremely sorry," Mr Street said on Tuesday.

The airline thought it had avoided any holiday weekend problems when it struck a pay deal with check-in staff and baggage handlers, averting a planned strike.