It has a simple premise: every day he pairs a piece of writing about ye olde London town with a modern snap shot of the city. An extract about Shoreditch’s bird market, penned in 1883, is accompanied by a shot of Roa’s famous crane mural on Hanbury Street. Charles Dickens’ musings on street pedestrians and scaffolding, published in 1882, feature alongside a photo of the 2013 Sou Fujimoto-designed Serpentine Pavilion, a lattice of steel polls set against London’s perpetually grey sky.