A report critical of the Metropolitan Police has found that a secret police unit kept information on families of 17 justice campaigns.
Although the police have apologised to the families involved, they insist there is no evidence that their undercover officers spied on or targeted perfectly legal justice campaigns.
ITV News correspondent Paul Davies reports:
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The prime minister was shouted at as she left the scene of the tragedy in which at least 79 people died.
Father-of-six Makram Ali, 51, was already receiving medical treatment as the attack unfolded. He died from multiple injuries, police say.
A review of how police and security services dealt with the latest terror attacks in the UK is to be launched, Amber Rudd has announced.