BTW I totally agree with the commissioner, when you're in those situations you shoot to kill as your life is on the line.

He did not actually say that. He said shoot to stop.

The same as in UK.

However, the only way to prevent an armed person from being able to shoot again is either to physically restrain him/her, or of you cannot do that, kill them.

John,
(former police officer in UK, authorised to carry a gun)