A vulnerable man, who does not even know his own name, has gone missing for the second time in three weeks.

Mehmet Calik, 52, was last seen by his care worker at his home in Boscobel House, Royal Oak Road, Dalston, just before 10am this morning.

Mehmet suffers from Korsakoff’s Syndrome for the past 25 years, which is a severe type of dementia, meaning he will most likely be confused and disorientated.

DI Paul Ridley from Hackney CID who is leading the investigation into Mehmet’s disappearance said: “I have a number of officers involved in searching for Mehmet.

“At this time we have no means of tracing his whereabouts and I am therefore heavily relying on sightings from members of the public.

“Mehmet is not dangerous but likely to display signs of confusion.

“If seen, please approach, engage him in conversation and call police immediately so that he can be provided with the professional support he requires.”

Mehmet is a Turkish man, 6ft tall and of slim build, and was last seen wearing black tracksuit bottoms, a cream coloured top and black shoes.

He is known to frequent coffee shops and churches in Islington around the Angel area, Kings Cross and Hackney.

He is not believed to be in possession of a mobile telephone, travel card or cash.

Anyone with information should call 101 or the charity Missing People on 116000, quoting reference number 16MIS018392.

Update: Mehmet Calik was found by Islington officers on the night of May 5.