As officers pull up outside a Victorian terraced home in east London, they take note of the number plate of the car parked on the driveway.
They fear it could belong to a domestic abuser who has been banned from the home because he is suspected of violently assaulting his partner. He was never prosecuted for the alleged attack because the victim was not prepared to make a statement. But if they find him here, it will be grounds for his arrest.
