Andy Burnham has criticised Greater Manchester Police for how it handled the fatal shooting of an unarmed man.
The force was scrutinised for shooting and killing Anthony Grainger in 2012, as he sat in a stolen car, in a public inquiry that was published earlier this year.
The Greater Manchester Mayor has told ITV News the force are preparing a report to help restore public confidence in GMP's firearms unit after it was branded 'incompetent' by an inquiry.
Mr Burnham is the region's Police and Crime Commissioner, meaning it is his job to hold the force to account.
Greater Manchester Police say that they are working to improve.
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Greater Manchester Police told Granada Reports: "CSDC is no longer used in either firearms training or operations in GMP having been removed from use a number of years ago."
A spokesperson for Her Majesty’s Inspectorate of Constabulary told Granada Reports that they are aware of the recommendations contained in the report and are will incorporate them into their inspection processes.
They have said that they have not yet inspected GMP's firearms capability since the report was published in July.
The National Police Chiefs’ Council lead for Armed Policing, Chief Constable Simon Chesterman, said: “We have been working closely with GMP to address the findings and recommendations arising from the initial review of the operation, the inquiry itself and the subsequent report.
“To do this we have created a structured action plan, not just addressing the specific recommendations but other aspects highlighted by detailed analysis of the report text, which we believe will help us improve the quality of our armed operations nationwide.
“Both the report and the resulting action plan have led to a review of our armed policing policy and training curriculum, and we have worked closely with the College of Policing and the Home Office to rewrite the Code of Practice on Armed Policing and the Police Use of Less-Lethal Weapons guidance.
“There are some recommendations contained within the final report that are not directly within the remit or responsibility of armed policing. We have, however, been fully engaged with those parts of the police service or wider stakeholders to ensure these have been progressed appropriately.”