Cambridgeshire Police joined a minute’s silence at 9.33am to pay respect to the victims of the Westminster attack that left four dead and more than 40 inured.

A spokesman said: “We held a minute’s silence to honour those who lost their lives during yesterday’s tragic events in Westminster.”

The spokesman added that they wanted to: “pay respect to the victims of yesterday’s attack, those injured and those affected.”

A massive police operation is under way after the attack outside the Houses of Parliament in the heart of London, yesterday (Wednesday 22).

At around 2:40pm yesterday, an attacker mowed down about a dozen pedestrians on London’s Westminster Bridge in a grey Hyundai.

Two people were killed on the bridge and approximately 40 other people were injured.

The vehicle then crashed into railings surrounding New Palace Yard and the attacker was seen running through the gates of the Palace of Westminster with a knife.

He stabbed an unarmed policeman Pc Keith Palmer, 48, before being shot by armed officers.

Pc Palmer had worked for the Metropolitan Police for 15 years, having previously served in the armed forces.

Paramedics fought to save his life and that of his victim on the floor of the cobbled courtyard just yards from the House of Commons.