The future success of the police is dependent on attracting the best and brightest to careers in the force, the Policing Minister has said, as a move to fast-track officers into senior roles come into force.
Damian Green added: "This is the first time that chief constables will be able to recruit talented and motivated leaders from other walks of life, who can bring a wide range of experience and expertise.
"They will receive world class training from the College of Policing and will bring a fresh perspective and approach, opening up policing culture which will benefit their colleagues and the public."
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Five people were killed and dozens more were injured after a car and knife attack in the capital on Wednesday afternoon.
Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.