Britain's top anti-terror policeman should receive "advice" because of his actions after the shooting of Jean Charles de Menezes, the Independent Police Complaints Commission has announced.
The IPCC agreed with the Metropolitan Police Authority (MPA) that Assistant Commissioner Andy Hayman should be advised as a result of its investigation.
Mr Hayman will now have to meet with the Commissioner and the Chairman of the MPA Professional Standards Committee, the IPCC said.
In a statement, it said: "On 6 November, the MPA recommended that Mr Hayman receive advice because he had broken Code 5 of the Police Code of Conduct that says officers should be conscientious and diligent in the performance of their duties.
"After taking legal advice, the three IPCC Commissioners, who oversaw the investigation, have decided to accept the MPA's recommendation."
The IPCC has also told the MPA it will follow its proposal to review "in depth" what lessons can be learnt from the fatal shooting of Mr de Menezes in July 2005.
Its report into the incident at Stockwell Underground station accused Mr Hayman of misleading senior officers by failing to tell them that the Brazilian was not a wanted suicide bomber.
Mr Hayman announced his resignation earlier this month after it emerged that he was facing an investigation into his expenses claims and foreign trips with a woman police sergeant.
The former chief constable claimed his resignation was down to the pressures of the job and "a series of leaks and unfounded accusations".
The 48-year-old has been asked to explain at least £15,000 of expenses which included claims for drinking with colleagues.
