The woman who was killed in the London terror attack outside the Houses of Parliament has been identified as 43-year-old Aysha Frade.

Mrs Frade was walking across Westminster Bridge to pick up her two daughters, aged eight and 11, from school when she appears to have been hit by the killer's car.

She was found dead under the wheel of a bus.

Mrs Frade was a teacher who taught Spanish at DLD college, located just a few hundred metres from where she died.

She was described as a "highly regarded and loved" member of staff, according to the Guardian.

"We are all deeply shocked and saddened," Rachel Borland, principal of the college, was quoted as saying by the Guardian.

Born in Britain, she was married to John Frade, a Portuguese national. Mrs Frade's mother and two sisters live in the Spanish town of Betanzos.

Her two sisters run an English school there, and Spanish media reported that Mrs Frade, although based in London, would make frequent trips to Betanzos to see her family, reported the Daily Mail.

Mrs Frade was one of three people killed in the attack.

Police officer Keith Palmer, 48, was stabbed to death by the attacker as he tried to prevent the latter from entering the Houses of Parliament.

A father of two, Palmer had served in the British police's parliamentary and diplomatic protection command for 15 years as an officer.

British police have confirmed the third victim to be a man in his mid-50s but have provided no further details.

40 people were injured, some seriously, including a 29-year-old Romanian woman who was knocked into the river Thames by the attacker's car.

Andreea Cristea, an architect, was pulled from the river having sustained serious head injuries and badly damaged lungs.

She was in London with her boyfriend to celebrate his birthday.

Two other police officers were also seriously hurt.

Citizens of 11 countries were among those injured, including France, Germany, China, the US and South Korea. There were also 12 Britons.