A London Underground sign is seen in central London
A London Underground sign is seen in central London September 6, 2010. As commuters prepared for travel chaos on Monday at the start of a series of strikes on the London Underground, management and unions traded blows over new safety claims. On Monday, up to 10,000 members of the Rail Maritime and Transport and white collar TSSA union, ranging from station employees to drivers, will put down their tools late afternoon at the start of four one-day strikes to protest 800 ticket-office job cuts. REUTERS/Toby Melville (BRITAIN - Tags: EMPLOYMENT BUSINESS TRANSPORT)