Facebook has been caught testing a new version of its News Feed, and brands are getting understandably worried.

The new feed, spotted in six ‘test’ markets, appears to remove branded page content from the main news feed, and hide it away on a secondary “explore” feed – making it easier for users to avoid content from brands and publishers that haven’t paid for promoted posts.

So what is Facebook doing with the feed, and should brands be worried? Sian Hall takes a look in Digital Minute.