Spanish utility Iberdrola SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Iberdrola-ES0144580Y14" target="_blank">BME:IBE</a>) plans to close its seven combined-cycle gas plants in Spain in “four or five years”, Spanish newspaper La Vanguardia reported on Sunday citing company sources.