UK service sector, however, has grown substantially, and now accounts for about 73% of GDP. The service sector dominated by financial services, especially in banking and insurance. London - the world's largest financial center with the London Stock Exchange, the London International Financial Futures and Options Exchange, and Lloyd Londoninsurance market all based in the City of London. London - the main center of international business and commerce and is the leader of the three "command centers" of the world economy (along with New York and Tokyo). It has the largest concentration of foreign bank branches in the world. In the past decade, a rival financial center in London, grew up in the Docklands area, with HSBC, the world's largest bank, and the Bank Barclays, moved their head offices there. Many multinational companies that are not primarily located in the UK, wanted to put their European headquarters or headquarters in London, rest of the world: an example - the U.S. financial services firm Citigroup. The Scottish capital, Edinburgh, is one of the major financial centers in Europe and is the headquarters of the Royal Bank of Scotland Group, one of the world's largest banks.