Sure, you may say you like ice-cream … but if you don’t insist on a scoop with your Christmas pudding, if you’ve never gone down an internet rabbit hole on the history of the Magnum choc-ice … then I’m afraid you’re a mere amateur. Take heart, however, because completing this list of some of the country’s best-loved parlours, vans and holes in the wall should go some way to elevating you to expert status before the summer is out.