Tommo (The End of Time)
From Tardis Wiki, the free Doctor Who reference
Tommo was a homeless man who lived in the wastelands of London in the 21st century, he was friends with a younger homeless man called Ginger. During Christmas time, they encounter another homeless man who resembled a previous Prime Minister, who was revealed to be the Master. The Master killed Ginger and him for their life force. (DW: The End of Time)