Whenever Nick Cave launches a new project in London, the same group of respectable goths and men in silk shirts find themselves together again, and recognition flickers – because you met this person last time, or you catch a glimpse of Ray Winstone again, or Will Self. It was like that at Her Majesty’s Theatre in 2013, when the Bad Seeds played Push the Sky Away in full for the first time; and at the Barbican in 2014, for a gala preview of Iain Forsyth and Jane Pollard’s film about Cave’s 20,000 Days on Earth. Last night, P.J. Harvey was ahead of me in the queue at the cinema, where I’d gone to watch One More Time with Feeling, Andrew Dominik’s film about Cave’s sixteenth album with the Bad Seeds, Skeleton Tree.