The City of London has a resident population of only about 10,000, but over 300,000 people work there during the day, mainly in the financial services sector. The local authority for the City, namely the City of London Corporation, is unique in the UK and has some unusual responsibilities. The Corporation is headed by the Lord Mayor of the City of London, which is separate from the Mayor of London. Over 500 banks have offices in the City, and the City is an established leader in trading in Eurobonds, foreign exchange, energy futures and global insurance. The disastrous Great Fire of London in 1666, consumed 13,200 houses, 87 parish churches, St Paul’s Cathedral, and most of the buildings of the City authorities. It started at the baker’s house of Thomas Farriner on Pudding Lane after midnight on Sunday, 2 September 1666 and spread rapidly west across the City of London.