Defiant Londoners returned to work on Thursday morning acting “as normal and unafraid” after a terror attack in the heart of the city that left four dead.

A black-clad man, armed with two knives, ploughed his car through a crowd of people on Westminster Bridge before fatally stabbing an officer outside Parliament. He was shot dead by armed police at the scene.

Less than 24 hours later, commuters have been using the hashtag "WeAreNotAfraid" in a show of solidarity, and to prove that life is already returning to normal in the capital.

Diane Abbott, the shadow Home Secretary, tweeted: “Off to work as usual like millions of Londoners,” on Thursday morning.

She was joined by thousands of fellow commuters getting on with their daily routines.

Users on Twitter were also sharing poignant quotes written on Tube station message boards.

Others responded to Katie Hopkins, who told Fox News that Britons were "afraid and disgruntled" in the aftermath of the attack.

She said: “People are cowed, people are afraid and people are not united.”

Speaking to Parliament on Thursday morning, Theresa May echoed the defiance of Londoners. “Yesterday, an act of terrorism tried to silence our democracy," she said.