The initial target had been to raise £10,000 for Pc Palmer, however donations passed the £100k mark within six hours of the page being created.

Stephen Redgewell, who started the page, said: “The Metropolitan Police Federation are raising money for the family of Pc Keith Palmer, the police officer who tragically gave his life on 22 March 2017 as he guarded the Palace of Westminster...”

Another page set up to help the Pc's family says: “Every day our intelligence community, armed forces and emergency services work to keep us safe; often in ways we never know about. Today they did just that - saving lives and mitigating such a horror.