Iran's Foreign Minister Mohammad Javad Zarif, the US Secretary of State John Kerry and EU's Catherine Ashton have resumed "intense" nuclear talks after a break, according to Reuters.
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Armed police were out in force as runners competed in the largest public event in the city since Monday's terror attack.
Taliesin Myrddin Namkai Meche, 23, was stabbed along with Rick Best, 53, when they tried to stop a racist attack on two Muslim girls.
The shadow home secretary, 63, said she worked in the Home Office for nearly three years when she was a trainee.