‘I was born in London,’ Ben Judah tells us early in this vivid portrait of Britain’s capital, ‘but I no longer recognise the city.’ London has become a building site where dirty money is converted into gleaming blocks of bullion. The smartest parts of town are lined with empty houses owned by foreign plutocrats, and London’s spirit is embodied not so much by the bearded hipster brewing your £3 cup of coffee as by the Shard, a soaring monument to wealth and inequality.