Mutya Keisha Siobhan make their long-anticipated return to the pop fray.

A clip of ‘Flatline’ did the rounds a fortnight ago, and the Sugababes-in-spirit have now aired the track in its entirety. Whereas the preview clip suggested an unlikely lurch for the Florence dollar, the full version of ‘Flatline’ makes a lot more sense, building from Robyn-style melodrama into fist-pumping stadium fare. Spector’s Fred Macpherson guests on backing vocals, and Dev Hynes (AKA Blood Orange and Lightspeed Champion) covers production .

MKS’ new single arrives on the same day of news of Roy Harper’s first album in 2013, continuing 2013’s astonishing run of comebacks.