Police have arrested a man and woman on suspicion of murder after a scaffolder was found dead with unexplained injuries at a flat in Pimlico.
Met police officers rushed to the scene on Page Street shortly before 8pm on Thursday after they were called to reports of a man found collapsed at a flat.
They found scaffolder Matthew Thomas, 39, who had suffered multiple injuries, including a head injury.
Mr Thomas was known to the occupants of the flat, police said.
Murder detectives have launched an investigation.
Officers said they believe he was either a victim of an assault, or that he sustained his injuries at work.
Police want to speak to anyone who may have seen him "fall or injure himself."
A 49-year-old man and a 53-year-old woman were arrested at the scene on suspicion of murder. They have been taken to a north London police station.
Detective Chief Inspector Noel McHugh, said: "We believe that Matthew may have been working as a scaffolder, and it is possible that he sustained his injuries at work. I need, as a matter of urgency, to speak with anyone he was working with, and who may have seen him fall or injure himself. Can you help us establish where he was working?
"At this early stage, it is also possible that he was the victim of an assault. I would ask that anyone who knows Matthew; anyone who can assist with his movements over the last week, especially on Thursday, please make contact with officers. We need your help in building up a picture of his movements before he went to the flat on Page Street.
"Any piece of information may help us to find out what happened to Matthew. It is important that we establish the facts for his family."