"If people swear at the police, they must expect to be arrested. Not just because it's wrong to expect officers to endure profanities, but it's also because of the experience of the culprits.
"If people feel there are no comebacks, no boundaries and no retribution for the small stuff, then I'm afraid they will go on to commit worse crimes."In fact, this was Johnson speaking at last year's Conservative Conference, but the principle must still hold.
The Guardian report of that speech helpfully goes on to say:
Although no specific offence of swearing at a police officer exists, it is an offence under section five of the Public Order Act 1986 to "use threatening, abusive or insulting words or behaviour within the hearing or sight of a person likely to be caused harassment, alarm or distress thereby".Later. And here is BoJo being applauded for saying it...