In the UK, sherbet is not a type of ice-cream like in America. It's a zingy powder that pops and fizzes on your tongue in a bubbly burst of sweet and sour.
Despite the name, this isn't an actual fountain of sherbet: it's a stick of licorice that you use as a spoon, a bit like a Fun Dip. The sticky, dark, almost-bitter aniseed taste of licorice goes brilliantly with the sweet effervescent sherbet powder as you lick it off.