As you arrive at Dalston Junction from the West, there’s a graffito to cheer you, high on a whitewashed wall overlooking a little car-park. Its inspiration is a far-too-famous poster of a 60s political icon: it’s a stencil – so it may well be all over the place – and it’s retained the basic (instantly recognisable) shape but dispensed with the eyes. Underneath is the caption: “CliCh’ Guevara”