A senior Liberal Democrat defended the party's decision to U-turn on the so-called bedroom tax, as the "evidence clearly shows" the policy is not working.
Tessa Munt told Good Morning Britain there was "no point in bashing your head against a brick wall if something is not working" and that the Government needed to change direction in order to get people into the right housing.
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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.