Pilots directly employed by Ryanair and who are members of its Irish trade union will go on strike for the first time on July 12 after the union said on Tuesday the airline had failed to meet demands over new working practices.

Europe's biggest budget carrier averted widespread strikes before last Christmas by deciding to recognize trade unions for the first time in its 32-year history, but has since struggled to reach agreement on terms in some countries.

Ryanair, which flies in 37 countries and carried 130 million passengers last year, has so far signed agreements with pilots in Italy and Britain, two of its largest markets, but also experienced minor disruptions in Germany and Portugal.