John McDonnell warns second EU referendum could prompt far-right violence

Shadow chancellor John McDonnell has cautioned a second EU referendum could provoke far-right violence on UK streets - but confirmed Labour is not ruling out support for another public vote.The Labour frontbencher agreed with recent warnings by fellow shadow cabinet member Barry Gardiner, who claimed a new referendum could give "succour to the extreme right" and prompt social unrest.Highlighting how supporters of ex-English Defence League leader Tommy Robinson clashed with police at recent demon