Boris Johnson made his final plea for voters to help him ‘get Brexit done’ tonight hours before the ballot boxes open – and with polls showing the result is still on a knife edge. The PM said it is ‘up to you now’ after another frenetic day of campaigning in which he warned the risk of a Jeremy Corbyn government is still ‘very real’. ‘Now is the time for this amazing country to come together and remember what it is capable of doing,’ he told a glitzy rally at the Olympic Park in east London. Mr Johnson urged activists to ‘fan out’ and convince people to ‘give a miss’ to the hard-Left platform of Mr Corbyn, and instead elect a ‘sensible, moderate, dynamic One Nation government’. ‘We have 24 hours to break the deadlock,’ he warned. The rallying cry came as a series of polls showed the Tories holding on to their lead over Labour – but the gap is not big enough to guarantee an overall majority when the outcome is finally revealed on Friday morning. A survey by Opinium, conducted yesterday and today, put the Conservatives on 45 per cent, down three points over the past week. Labour…