From penny-licks to Greensleeves: The history of ice cream van jingles

It’s summer (allegedly), and all around the country, small vans are driving around residential estates playing music out loud — and people are smiling when they hear it.It’s the familiar jingle of the ice cream van, and hearing it the other day made me wonder — why are they allowed to play music in the first place. It’s such an odd thing when you think about it, as no one else would be allowed to do that.
Is there an ice-cream van exemption from noise pollution? Aft