London is by far the largest city and capital of the United Kingdom since many centuries. It's a city with large banks operating worldwide. The total balance sheet of the largest banks seems to be 5 times the gross domestic product of the United Kingdom. This kind of dominance of the Finanacial sector is only to be found also in countries like Switzerland. London is really a city of worldwide importance and a hub of business and finance. London is also a major tourist attraction all your long.