PM warned Brussels summit that free movement was at heart of Britain’s decision to reject European UnionDavid Cameron warned Europe’s leaders that they will have to offer the UK more control over immigration at the end of a fractious day where politicians across Europe clashed over the meaning and consequences of last week’s Brexit vote.The British prime minster used his last Brussels summit to tell Angela Merkel, François Hollande and other European heads of government that anxieties about unrestricted freedom of movement were at the heart of the decision by Britons to reject the EU.