Britain's Prime Minister David Cameron speaks during a question and answer session on the forthcoming European Union referendum with staff of PricewaterhouseCoopers in Birmingham, central England, on April 5, 2016. Prime Minister David Cameron came under pressure to explain his family's financial affairs on Tuesday after the so-called Panama Papers revealed his late father ran an offshore fund which avoided paying tax in Britain for 30 years. / AFP / POOL / CHRISTOPHER FURLONG (Photo credit should read CHRISTOPHER FURLONG/AFP/Getty Images)
