Mr Cameron, seen inspecting a skateboard with Shiner chief executive Charlie Allen, said Britain would be 'bigger and better' if it stayed in the EU

11am: Mr Johnson went on a walkabout in Ashby de la Zouch as part of his final push for Brexit yesterday

The former London mayor posed for selfies and chatted to members of the public during his visit

But he was heckled by 17-year-old Will Taylor who said: 'I'm annoyed that I can't vote and as a young person it's my future.'

In a speech to Unison's annual conference in Brighton this morning, Mr Corbyn said Labour supported EU membership but wanted reform.

Thursday's vote will be one of the most 'significant ' decisions ever taken in this country, he said.

Mr Corbyn added: 'Labour formed the NHS, creating healthcare as a human right. That does not apply to most countries in the world. We have to defend that principle to our dying day.'

He also attacked comments by supporters of Brexit against a health service free on demand.

'A vote to leave will put the NHS in jeopardy,' he told the Brighton conference.'

The veteran left-winger later addressed a rally in central London.

7am: Boris Johnson kicked off his frenetic last round of campaigning at London's famous Billingsgate Market this morning