Vox became the first far-right party to win more than a single seat in Spain's parliament since the Franco era when it won 24 in the general election. Last week, it fought its first mayoral campaign in El Ejido, a town in Andalucía with a population of 90,000 people, 30% of whom are migrants. Many of them work in the 150 square miles of greenhouses that surround the town. We follow the campaign and talk to Spaniards and migrants to find out why this socialist stronghold of 40 years is turning to the right