City of London Since 1991 Canary Wharf, a few miles east of the City in Tower Hamlets, has become another centre for London's financial services industry which houses many banks and other institutions formerly located in the Square Mile. Although growth has continued in both locations, and there have been relocations in both directions, the Corporation has come to realise that its planning policies may have been causing financial firms to choose Canary Wharf as a location. Many major global companies have their headquarters in the City, including Aviva, BT Group, Lloyds Banking Group, Old Mutual, Prudential, Schroders, Standard Chartered, and Unilever. A
History of the London Underground early years of the 20th century, UD signs appeared outside stations in central London. World War I delayed extensions of the Bakerloo and Central London Railways, and people used the tube stations as shelters during air raids in 1915. After the war, government-backed financial guarantees were used to expand the network, and the tunnels of the City and South London and Charing Cross, Euston and Hampstead Railways were linked at Euston and Kennington, although the combined service was not named the Northern line until later. The Piccadilly line was extended north to Cockfosters and took over District line branches to