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 toddler was taken to hospital along with two girls, aged five and six, and a woman who was also injured.
London's smallest pub is set to start pulling its first pints in a shed in Greenwich.
A controlled explosion was carried out after officers were called earlier today to north Greenwich.