Can we trust the political adverts in our news feeds? Who is sending them, why are we being targeted and are they even true? This week we're looking at the thorny issue of political advertising on social media. Is regulation needed to ensure fair and trustworthy election campaigns or would restrictions endanger free speech and limit voter choice? Ed Butler is joined by Rory Cellan-Jones, BBC technology correspondent, data rights lawyer Ravi Naik, Lisa-Maria Neudert, doctoral researcher at the Oxford Internet Institute and Michael Duncan partner and digital media lead at Cavalry, an issue management firm in Washington DC. (Image: Man looking at phone on a bus. Image credit: Getty Images)