No real mystery. Its a common law offence throught the UK to conduct yourself in a manner which is likely to cause a breach of the peace.
If you sat outside a Mosque in Birmingham blaring out Skrewdriver you would be dealt with in the same way.
Wolf Tones, in your garden at a bar b que = no offence.
Wolf Tones, at an Orange Parade = conduct likely to cause a breach of the peace.
Must have been a quiet parade for the bandsmen to be drowned out by a car stereo.
The words " Wolfe Tones " and "music " should never appear in the same sentence.
I agree that it is a seriously illiberal judgement.
I would have favored him just being told to clear off, not prosecuted.
Don't feed the troll!
People say Jesus wasn't a jew but we know he Isreali