Mat Collishaw's new show 'In Camera': Death, sieges and crushed bugs

It's Monday afternoon and Mat Collishaw emerges from the King William in Camberwell, blinking and with a cigarette in his fist. It might be the perfect vignette of former YBA behaving badly were it not for the fact that the cigarette is electronic and the handsome 1930s pub, still advertising LONDON STOUT in stone carving above the door, is Collishaw's studio and home.