The tall and wide buildings still look distinctly Victorian from the exterior, with light-coloured brick and red-roofed spires.

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Here, the deep burnt sienna red of the soil - rust-coloured because of its richness in iron - mingles with thickets of foliage and a sweep of clear sky.

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Adam Lubroth, a contemporary American photographer, uses the technique to create brightly-coloured images of people sitting grumpily in their cars at red lights.

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Drawn on a piece of paper, the spokesman said it was "full of the pop art motifs we have now come to recognise, including Warhol's signature bright red lips, made using lipstick, and a typically pop art blocked background, coloured with green and orange felt-tip pen".

BBC: Warhol sketch