Police officers face being punished for being rude to the public under new rules planned to improve the reputation of service.
Warnings about clocking on when unfit or impaired through drinking alcohol, using drugs or having sex while on duty will also be contained in the new code of ethics, it has emerged.
Officers will be urged to blow the whistle on colleagues of all ranks if they breach professional standards.
Failure to abide by the regulations could lead to disciplinary action and possible dismissal.
Earlier this year Theresa May issued a stark warning to police that they must reform or change would be forced upon them following a series of incidents that shook public confidence, including the Hillsborough cover-up and the so-called Plebgate scandal.
The Home Secretary is understood to back the guidelines drawn up by the College of Policing and they will go before parliament, although no date has yet been finalised.
Conservative James Clappison, who sits on the Home Affairs select committee, told the Daily Telegraph: "The over-whelming majority of the police are polite to the public but I think it is useful to set out.
"I think this will be good for the police themselves and for the public and give them even greater confidence in them. The overwhelmingly majority of police are decent and conscientious."
"If officers breach the code of ethics a range of sanctions are available. Officers may simply be given a verbal warning or moved to another team, but more significant failures will require formal investigation and may result in an individual losing their job.