Almost 20 officers are refusing to carry firearms following the suspension of two of their colleagues over the fatal shooting of an unarmed man.
Harry Stanley was shot dead as he was leaving a pub in Hackney in 1999. He was carrying a table leg in a plastic bag, which the two officers are alleged to have mistaken for a sawn-off shotgun.
The suspensions followed the verdict of unlawful killing which was returned at an inquest on Friday.
The Stanley family solicitor, Daniel Machover said the inquest had decided the officers were not acting in self defence and told the BBC Radio 4 Today programme that the jury "did not believe the officers when they said they felt under imminent threat".
Despite the 20 officers handing in their weapons cards, Scotland Yard said armed cover levels in London remain "unaffected".