Six hundred extra armed officers are to be trained and patrols more than doubled to help counter the threat of a terrorist attack in London, the Metropolitan Police has announced.
It will bring the total number of armed officers in the capital to 2,800.
Met Commissioner Sir Bernard Hogan-Howe said: "It will be an expensive option, but is vital to keeping us safe."
It comes after Scotland Yard reassessed its ability to respond to armed attacks after last year's Paris Terror Attacks, the BBC reports.