This is from The Guardian, what they say is "a secret audience with investment bankers a month before the EU referendum."

  • Theresa May privately warned that companies would leave the UK if the country voted for Brexit
  • reveals she had numerous concerns about Britain leaving the EU
  • "I think the economic arguments are clear," she said. "I think being part of a 500-million trading bloc is significant for us. I think, as I was saying to you a little earlier, that one of the issues is that a lot of people will invest here in the UK because it is the UK in Europe.
  • If we were not in Europe, I think there would be firms and companies who would be looking to say, do they need to develop a mainland Europe presence rather than a UK presence? So I think there are definite benefits for us in economic terms."

I'm not totally up with the nuances of the politics, but my understanding is May was a 'remain' voter, so this shouldn't be too surprising?

I could be wrong though.

Link the article, here