The EU elections, beginning on 23 May, are a test for Europe’s mainstream parties as populists appear to be gaining momentum with stark anti-immigration campaigns. Anushka Asthana is joined by Jennifer Rankin, Shaun Walker and Angelique Chrisafis to assess the rising tide of populism across the continent. Plus: Simon Hattenstone on what an accidental voicemail recording revealed about G4S’s private ambulance service. Help support our independent journalism at theguardian.com/infocus