Labour leader Jeremy Corbyn (C) lays a wreath as he attends a vigil to slain Labour MP Jo Cox in Parliament square in London on June 16, 2016. Cox died today after a shock daylight street attack, throwing campaigning for the referendum on Britain's membership of the European Union into disarray just a week before the crucial vote. / AFP / DANIEL LEAL-OLIVAS (Photo credit should read DANIEL LEAL-OLIVAS/AFP via Getty Images)
