Police are appealing for the public’s help in locating 75-year-old Juan Boga.
Mr Boga was last seen in Ruislip at 20.00hrs on Thursday.
He is described as five foot four inches tall and medium build.
He was wearing a blue jacket and jeans with black t-shirt and trainers.
He does not speak English and may appear confused.
If seen, call 999 quoting CAD ref 6654/21FEB.