From the BBC:
The government has promised to push for an end to tariffs on UK-made ice cream vans during trade negotiations with the US, Australia and Japan...
The vans, many of whose owners also sell coffee, tea and frozen yogurt, are a familiar sight on UK roads.
During summer, they alert potential customers when they approach a park or suburban street by playing bursts of classic tunes, such as Greensleeves or Giovanni Capurro's O Sole Mio - known to many in the UK as the theme once used in Wall's Cornetto adverts...
[the UK] remains one of the world's leading exporters of the vehicles, which can sell for tens of thousands of pounds.