Way back in 1601, Elizabeth I demanded that "blackamoors" should be "discharged with all speed, out of these dominions", but the command was quietly ignored by the migrant ex-slaves and servants, many of whom had settled down with white women and had children. People have always been received into this country as asylum seekers, immigrants and workers. Our most recent asylum legislation means applicants awaiting decisions are denied benefits, and appeals procedures have been made harder, especially for those from the so-called "safe countries" It was not (altogether) ever thus. They may claim to be genuine immigrants and refugees, but to him most are cheats, scroungers and, above all, aliens who are bound to defile all that makes this country British. As unprecedented numbers of people - an estimated 50 million refugees - are uprooted around the world, this fear and hatred of the outsider has been growing, actively nurtured by some tabloid newspapers and Tory politicians.

The British Bulldog is an increasingly nervy beast: snarling and snapping at dark strangers, sniffing them out in the back of stinking lorries, protecting his territory from people whom he believes are a threat to his good life. What will this mean? London, supreme metropolis of an eclecticism which includes comfort but eludes prediction, is very tantalising on this question. Because the city is so old and new, so traditional and experimental, because it has sucked up the whole world but only half-digested it, because it doesn't know where it's going, because its intelligence is directed away from itself, because it is unknowable, London is the most up-to-date place there is.. What a crashing bore they all are in their single-minded modernism.In the future, any place or person that is only one thing will appear lifeless and dated The next phase in evolution is multiple identity. Even these brand-new triumphant cities of the Pacific Rim - Shanghai, Hong Kong, Singapore, Tokyo, Seattle.

And everywhere else seems slightly old-fashioned after London. Even its squalor becomes stylised into a kind of desperate Dickensian cuteness: squat chic. But, unlike the Continentals, no one slavishly follows fashion in London Instead, they make fashion Everyone looks different. Barricades? Where could you put them? People would just go round another way It's impossible to have such big adventures in London. But, if all else fails, the city uses its secret weapon: naffification London consumes fads, ideas, cultures at the highest speed. Take any of it too seriously, and you become naff.The lurid excess and charm, the thudding collisions of it and the failure of collisions, too, makes a style of no style and every style. London is too big and too fragmented for mass behaviour of the revolutionary sort, and the streets are too narrow and bendy.