The suspensions stem from a BBC investigation, in which a reporter obtained a job as a civilian detention worker in the custody suite at Charing Cross police station.
Accusations, which will feature in an upcoming Panorama documentary, include excessive use of force, discriminatory and misogynistic comments, and failing to report or challenge inappropriate behaviour, the police watchdog has said.
The officers being investigated range in rank from police constable to sergeant, the Independent Office for Police Conduct (IOPC) said.
Assistant Commissioner Matt Twist said: “As a result of information received on 9 September 2025, enquiries were immediately launched by our Directorate of Professional Standards into allegations of criminality and misconduct by officers and staff based at Charing Cross Police Station
“The behaviour as reported is disgraceful and nine officers were suspended within 24 hours of the allegations being assessed and another two officers have been removed from frontline duties.
Charing Cross police station has previously come under fire after a 2022 report by the IOPC revealed officers had exchanged highly offensive messages, including repeated jokes about rape, domestic violence and violent racism as well as homophobic language and derogatory terms for disabled people.