Calling Thursday's U.K.-wide referendum "the most important vote in my political lifetime," Soames took a long view and told CNBC that he believes it would be a mistake for the country to step away from the relative stability it has enjoyed since it joined the EU.
"I mean, you know, in one week's time we celebrate the first day of the Battle of the Somme, where 57,470 ... British soldiers gave their lives in one day," said the Conservative member of Parliament. After the human upheaval of two world wars, "we've achieved peace, prosperity and security on a scale unimagined for a thousand years. Is it a sensible thing to leave? I don't think so."