Black pudding was a kind of sausage made from a blend of onions, pork fat, oatmeal and pig's blood. It was included as part of a full English breakfast. It was also possible to make black pudding without pig's blood, resulting in white pudding.
Torchwood Three had black puddings as part of their full English breakfasts at a Turkish restaurant over Cardiff Bay. After finding out what a black pudding consisted of, Jack Harkness decided to give it a pass. (PROSE: Slow Decay)
George McDermott said that the plastic chair Farrel Plastics produced under the Master looked like a black pudding. (TV: Terror of the Autons)