Milkman (The Ghost House)
From Tardis Wiki, the free Doctor Who reference
A milkman brought milk to the people at Bannerman Road.
John O'Brien and his parents bought a lot of milk from the milkman. In 2009, the family went away on holiday for three weeks. The milkman said that it had cost him a fortune that the family had cancelled their order. One morning, he passed by the empty house at 39 Bannerman Road and saw how the house swapped places with a Victorian house from 1884. He told Sarah Jane Smith that he thought that a film was made at the house. (AUDIO: The Ghost House)
