British Airways pilots plan to strike for the second time this month.

The British Airways Pilots 'Association (BALPA) is scheduled for Friday September 27, and follows the unprecedented worldwide grounding of British Airways' fleet due for its previous strike on September 9 and 10.

With BALPA representing the majority of BA's pilots, it seems that almost all flights will be affected. The one-day action is therefore likely to have a knock-on effect.

A BA spokesperson told Business Traveler:

On August 23, BALPA, the pilots' union, called a strike on 27 September. It is now a month since we shook hands on a pay deal. We urge them to call off their strike and return to negotiations.

On an alternative date, destination or airline.

"We are very sorry that BALPA's actions will affect more travel plans."

BALPA took to Twitter yesterday to accuse BA of beginning flight cancellations yesterday in order to "avoid having to pay affected passengers."

However, BA has countered this with the following statement:

"We have put forward new ideas through ACAS this week and have called on BALPA to meet us face-to-face as soon as possible to return to negotiations.

"However, we need to give our customers certainty, so we have been touched by the union's strike on September 27."

Under EU261, the European Union's Flight Compensation Regulations, which are entitled to a full refund or alternative flight arrangement, are not required.

The union also said:

"BALPA set a gap between the first and second periods of strike action to give.

"We have been exchanging new ideas to do that via ACAS and so it has been irresponsible and inconsiderate to its customers that BA has pulled out and decided to start canceling flights now, just to save money on compensation.

"BA did not respond to our latest proposals before canceling these flights. Passengers who want to do so have been given multiple opportunities to work with us so we could call this action. "

BA says it has added support to its support teams, but many are still reporting struggling to get through.

The strike is over pay, with pilots offered at 11.5 per cent pay increase over three years, which has the union has rejected.

BA previously faced criticism after incorrectly emailing passengers stating that their flights had been canceled due to strike action, even though they were flying on unaffected days.

The disruption comes as British Airways rounds of centenary celebrations.