Officers believe the victim was in his 20s.

A post-mortem examination is scheduled to take place tomorrow at St George’s Hospital.

Detective Chief Inspector Dave Blair said: 

“Our initial enquiries have established that this incident probably took place inside the address on Wedesday night or the early hours of the following day.

“Were you in the area of Dowdeswell Close around that time and saw or heard anything suspicious? If you have any information, no matter how insignificant you think it may be, I would urge you to contact my team – it may prove vital in enabling us to piece together the events that led to this violent attack.

“I want to reassure the community that specially trained murder detectives, supported by local officers, will work tirelessly to ensure those responsible are caught.”

Detective Superintendent Owain Richards from the South West BCU which covers Putney said:

“I understand the shock and concern an attack like this will have caused throughout the community.

“Over the coming days you will see local officers patrolling in and around the area to offer reassurance and if you have any concerns then please speak to them or contact your local policing team.

“There has been, and will continue to be, a significant police presence in the area and I would thank residents in and around Dowdeswell Close for their patience and support while this vital work is carried out.”

There have been no arrests; enquiries into the circumstances continue.

Anyone with information that could assist police is asked to contact the incident room on 020 8721 4266; alternatively you call dial 101 or tweet @MetCC and quote CAD2294/6May.

Information can also be provided anonymously to the independent charity Crimestoppers via 0800 555 111.