A walkout by British Airways cabin crews is set to commence on Friday, with the carrier planning to give details on its contengency plans in the days ahead.

The four-day strike, part of a long simmering pay dispute at the UK company, now comes with an additional walkout set for February 22, aimed at ramping up pressure on the airline’s management.

British media have reported that BA staff have had 11 days of strike action this year.

According to BA, flights out of Gatwick will proceed as usual on Friday, as well as London City Airport and the “vast majority” of departures scheduled for Heathrow.