How has David Cameron made a surprise return to British politics?

We're joined on this week's episode by Dominic McGrath, PA Media political correspondent, to dissect the former UK prime minister's unexpected comeback. What is Cameron's background, what could he achieve in the role - and what exactly is the end goal here? The Explainer is brought to you by The Journal. Providing open access to valuable journalism in Ireland has been the aim of The Journal for a decade. You can contribute to ensure we can keep questioning, investigating, debunking, explaining and informing at www.thejournal.ie/contribute/