The video shows a slim man suddenly appear outside the entrance of South Ruislip Community Association and Community Centre on February 1.
It captures the transparent figure walking calmly towards a metal railing before seemingly disappearing into thin air.
The strange moment was reportedly witnessed by the centre�s caretaker who went outside to investigate.
�I was sitting inside the hall and noticed a figure on the front CCTV camera,� the caretaker is quoted as saying in the video.
�I looked up at the screen and thought I saw a person but wasn�t sure so went out to check.�
He added: �I went outside and no one was there but I thought they might have quickly walked around the side of the building into the park so I just went back in.
�After downloading the CCTV footage I was surprised to see that the figure had been recorded onto the system.
�I can�t explain this.�
Run by a local committee since 1945, the centre was reportedly used as a prisoner of war camp for Italian prisoners during World War II � leading many to speculate the haunting figure may be from the 1940s.
A previous chairman is said to have believed the building was haunted and he used to greet the spirits when he entered the building in an attempt �to make them friendly�.
The video has racked up over 100,000 hits online, with users remaining divided over the authenticity of the footage.
Source; Metro UK