Carrick, who was given 37 life sentences for his crimes, was not properly vetted in 2017, with checks failing to reveal an allegation of domestic abuse against him.
Mitchell, who carried out a “campaign of rape” on two victims, was recruited despite an earlier allegation of raping a child.
His recruitment was initially refused after failing the vetting process due to the allegation but his application was looked at by a vetting panel, which has since been abolished.
Part of its aim was to tackle disproportionality in the workforce. The panel, first established in 2018, overturned decisions to refuse vetting of 114 officers and staff, of whom 25 went on to commit misconduct or have been accused of a crime.
The review said senior officers faced political pressure and had to meet recruitment targets or lose funding to other forces.
The review published on Thursday found that thousands of police officers and staff were not properly checked amid pressure during a national recruitment drive from July 2019 to March 2023.
Senior officers at the Met chose not to meet national guidelines amid a scramble to find more than 4,500 recruits.
The deviations from standard practice meant thousands of references were not checked, and shortcuts in vetting led to there being some officers and staff who should not have been in the force. This contributed to “police-perpetrated harm” and damaged public trust, the review said.
Under the Police Uplift Programme, forces in England and Wales were expected to recruit 20,000 officers within three and a half years to replace those cut during austerity, and funding was ringfenced and lost if targets were not met.
