Ad companies Facebook and Google slurp one in every three and a half minutes that Britons spend online, according to a survey. From a report: This, says audience metrics company Verto Analytics, accounts for 17 per cent of British adults' time online, the equivalent of 42.7 million days a month across Google, YouTube and Gmail. Similarly, Facebook-owned sites, including the ad-driven data-mining website itself, Instagram and WhatsApp, account for 11 per cent of time online, or a relatively paltry 28.4 million days. "Google and Facebook's share of internet time and ad revenue is staggering considering the hundreds of thousands of websites that exist," said Hannu Verkasalo, CEO of Verto Analytics, in a canned statement. The Verto survey also found that of the top 10 websites used in the UK, the sole British one was the BBC. Microsoft, Apple, Amazon, "Oath" (the new name for the merged Yahoo-AOL beastie), eBay and Twitter were the others, along with Activision Blizzard.