A 54 year old man with no permanent address is to appear at Uxbridge Magistrates Court today charged with murder.
Guiseppe Lomedico will appear in custody.
Detectives from the Homicide and Major Crime Unit allege he murdered a 50 year old man at a flat in Cumberland Park, W3.
The name of the victim is being withheld by the Met Police until next of kin have been informed.
A 50-year-old man has been released on police bail to return on a date in mid April.
Another 44-year-old man remains in custody while ongoing enquiries continue.