Don’t think so. Commenters say:
# Salmonella is very common in ice cream products. I don’t think these vans properly maintain the temperature of the product overnight. Also, selling from a van is not conducive to hygene. Handling money and probably a grubby steering wheel and road fumes is not my idea of the correct environment to sell a tricky food item.
# The real reason is cost, just as pubs have gone out of business to MUCH cheaper supermarket beer, so ice cream vans will go the same way, they are pricing themselves out of the market for the majority of customers, it’s as simple as that.