The second oldest white horse in Wiltshire is just a few miles from Avebury
Comfy beds and a vegetarian breakfast on the western edge of the village
A B&B with a billiards room and bar just north of Avebury's stone circle
The generic British word for dessert is "pudding."
In the 19th century, the "g" was sometimes pronounced as a harder "k." Sometimes, the "n" got dropped. Sometimes that was shortened by slicing off the "pud."
In other words, small, incremental changes resulted in pudding->puddink->puddik->dick.
It's not meant to be dirty; it's just a Victorian synonym for "dessert."
Pepper a cake with currants or raisins, and you get "spots" in your pudding, hence: spotted dick.