Humbug (sweet)

A humbug was a mint sweet carried by the Fourth, (TV: The Sun Makers) Eighth, (PROSE: Coldheart) and Thirteenth Doctors. (TV: Ascension of the Cybermen)

The Fourth Doctor once offered a humbug to Gatherer Hade after their meeting adjourned. (TV: The Sun Makers)

The Thirteenth Doctor once offered one, out of a paper bag, to her companion Ryan Sinclair when he complained of motion sickness aboard a stolen Cyberfighter. She said that it contained added ginger. (TV: Ascension of the Cybermen)

Behind the scenes
Despite the Fourth Doctor calling it a humbug, the sweet taken by Hade was in fact a jelly baby. This incident is similar to one in Image of the Fendahl where the Doctor offers a jelly baby that is in fact a liquorice allsort.