Anti-war protesters have set up camp outside an arms fair, being held at London's ExCel centre.
The DSEI event is described as the world's largest fully integrated defence and security exhibition, with nearly 30,000 visitors and 1,500 exhibitors.
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The Olympic champion released a statement after a newspaper alleged his American coach may have broken anti-doping rules.
Five hurt after a car crashed into a group of pedestrians in south London.
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