We are appealing for help to find a man from Wandsworth who has not been seen since Thursday, 6 June
Mazhar Ahmad, aged 58, was last seen around Hyde Park Corner at 17:38hrs.
Mazhar had been visiting the Natural History Museum with his father when he made off after they left.
His father last saw him outside the Museum, heading towards Knightsbridge.
Mazhar is vulnerable and requires medication for his mental health that he does not have with him. He speaks very little English, and will not talk to strangers, meaning that officers are concerned he will be either unable to ask for help, or may have been taken unwell somewhe