Little-known '12 second rule' for every ice cream van in the UK

A little-known '12-second rule' currently affects every ice cream van operating across the UK this summer. While the familiar tunes associated with these vehicles often feel as though they play for a significant duration, this specific regulation dictates exactly how long the music can be played. Most people recognise the iconic sounds of the vans, yet few are aware of the legal restriction that limits the length of these audio signals during operation.