There are one or two Game Of Thrones fans at FFS. And by fans, we mean borderline obsessives. Fellow, um, enthusiasts will know the significance of the song ‘The Rains Of Castamere’ – it features at some key moments in the books and the show, and was covered by The National for a big episode in the second season. Now Sigur Ros have had a go, and the results are pretty striking. We won’t say any more than that for fear of spoilers.