Police are seeking information to locate an unidentified girl, believed to be aged in her teens, who was last seen in the early hours of Monday, 1 April.
She spoke to a man outside the Middlesex Arms on Long Drive in Ruislip before 2am and indicated she was going to harm herself.
A CCTV image obtained shows her on Ruislip High Street near Eastcote Road at 2.10am
Information was then received that she may have been seen at Dawley Road, Hayes in the company of two women at 3.30am.
Officers are concerned for her welfare and are keen to locate her.
The girl, described as white with long blond hair, was dressed in a long camel coloured coat over a light coloured pyjama top, black bottoms with coloured dot patterning, black Adidas trainers and a cream scarf.
Please call 101 quoting CAD542/1Apr if you recognise this girl or have any information about her whereabout