MORGAN STANLEY: These 4 charts show how 'Brexit' could be more likely than people think

The June 23 EU referendum is the biggest event in the political calendar.

Looking at the polls, Morgan Stanley analysts Jacob Nell and Melanie Baker estimate there's a 40% chance of a Brexit in June.

But while it's slightly more likely that the UK votes to stay in the European Union, Morgan Stanley has picked up on a few trends that could scupper that.

They see the result as close run because of several built-in beliefs that separate Brits from continental Europeans.

Here are the charts that should make the Remain campaign nervous.