The Guardian 18th November says that - "The law makes it clear that shooting to kill has to be justified......" Mr Rozenberg's article comes in the wake of comments relating to "shoot to kill" made by the Leader of the Opposition (Rt. Hon. Jeremy Corbyn MP) - see BBC 17th November
As Rozenberg (rightly) states, shooting with intent to kill can certainly be an option available to the Police or Security Forces if faced with a situation in which a criminal is threatening human life. Whether actually killing someone is lawful will depend on all the circumstances including information given to the Police Officer or soldier who actually fires the gun.
In June, The European Court of Human Rights heard the case of Da Silva.
This is concerned with the shooting at Stockwell (London) of Charles de Menezes. Judgment of the court is awaited. See previous post 8th June 2015. This case also amply illustrates, if such illustration is needed, that the Police and security authorities must operate within the law.
Meanwhile, the authorities would do well to ensure that there are adequate numbers of properly trained and equipped officers to cope with terrorist situations. Cuts to policing are worrying many people. - Express 25th October - and any government will pay a heavy political price if the authorities are found unprepared or otherwise wanting in a terrorism situation.
Sean Jones QC - There's a time and a place: a reflection on Jeremy Corbyn's response to the Paris attack.