Is swearing at the poice a crime?

From The Telegraph last year:

'Swearing at police is not a crime because officers hear foul language “too frequently” to be offended, a judge has ruled.

...

Overturning Denzel Cassius Harvey's conviction, Mr Justice Bean said officers were so regularly on the receiving end of the "rather commonplace" expletive that it was unlikely to cause them "harassment, alarm or distress".'

There's something that defenders of the police position re Andrew Mitchell would do well to think about.