When I wer't lad, you could still get sweets worth a farthing, although the actual coin was out of circulation. They were sold 4 for an old penny. I can remember blackjacks, fruit salad, golf balls, and sour apples. There were others. Also there were 3 old penny Jamboree bags. Which would contain some of the aforementioned along with licorice sticks and the like. Also for 3d was Fry's Five Boys - a chocolate bar. I can also remember Caramac. And a rather expensive round disk chocolate (about 12 to a tube) I can't recall the name of. It wasn't Rolo's although they were good as well.
And then there was the Milky Bar Kid