If you believe the opinion polls, it is hard to see how Labour can win this election.

The party is trailing the Conservatives by 13 points while Jeremy Corbyn has the lowest satisfaction rating of any party leader.

But the polls do not tell the whole story, and it is possible to see a route to Downing Street for Mr Corbyn either as a prime minister in a Labour majority government or, more likely, as the head of a minority government backed up by anti-Brexit parties.

So what is Mr Corbyn’s path to victory?

The Conservatives are doing two things that make it hard for them to win a majority. They are trying to win more seats in what would be their fourth