Stubborn Heart has been played over 10 times on NTS, first on 9 October 2012. Stubborn Heart's music has been featured on 13 episodes.

What's so good? So this has been sold as being for “fans of the three Js” – James Blake, Jamie xx and Jamie Woon. Needless to say, I was immediately interested.

But which J does this mysterious London producer sound most like? At first, I was inclined to say Woon, the soulful vocals carried by a bassy melodic tune. As the song progressed, though, my view switched to Blake, with the interference and spacing bringing him to mind. By the end, I…