The cabin crew staff at low-cost airline Ryanair plans to strike for better working conditions on 12 more days in July, as a wave of industrial action hits Spain during the busy holiday season. The walkouts have been scheduled for July 12-15, 18-21, and 25-28, the Spanish unions USO and Sitcpla announced on Saturday. Numerous airports are affected by the Ryanair strikes: Madrid, Barcelona and Mallorca, as well as Málaga, Seville, Alicante, Valencia, Girona, Ibiza and Santiago de Compostela. Ryanair cabin crew had already gone on strike in Spain at the end of June and also between Thursday and …