According to the Deputy Commissioner and head of counter terrorism at the Metropolitan Police, Mark Rowley they know who the terrorist is and that he was inspired by international and Islamist-related terrorism. However, he did not give further details.
It should be reminded that the attack unfolded at about 14.40 GMT when a single attacker drove a grey Hyundai i40 along a pavement over Westminster Bridge, near the Houses of Parliament in central London, killing at least two people and injuring many more.