Holly Humberstone duetted her song ‘Friendly Fire’ with Bombay Bicycle Club frontman Jack Steadman.Their performance of the track – which closes out Humberstone just-released second EP, ‘The Walls Are Way Too Thin’ – came towards the end of the singer-songwriter’s set, performed at the O2 Shepherd’s Bush Empire on Monday November 8.It’s a faithful recreation of the slow-burning track, sans its swelling atmospherics and pared-back drum beat.