An anonymous reader writes: The UK faces a potential economic backlash from its decision to exit the European Union, but London Mayor Sadiq Khan doesn't think tech startups should be worried. Khan on Monday stopped in New York while on a goodwill tour that included visits to Montreal and Chicago. His mission: to win back the hearts of tech companies that may be turned off by Brexit. The breakup looks bleak for tech, with nearly nine out of 10 British tech leaders opposing Brexit before the June vote. And while the effects of Brexit haven't taken hold yet, Khan remains optimistic about London. The British metropolis remains Europe's hub for the technology sector, Khan said, citing a poll commissioned by London & Partners, the mayor's economic promotional company. "London's been open to people, to trade and to ideas for more than a thousand years, and that's not going to change," Khan said Monday at the Chelsea office of workspace company WeWork. The survey reached out to more than 200 US tech executives, who believe London is the best city in which to build a startup in Europe, beating out Berlin, Paris and Dublin. While Brexit means London soon won't have access to the EU's open market across the continent, US tech leaders still choose the city for its "favorable time zones and lack of language barriers," according to a statement from the mayor's office.