Police are growing increasingly concerned for the welfare of a missing 78-year-old woman with dementia.
Lurline Harris was last seen at her home in Connington Crescent, Chingford, at 4.15pm on Thursday.
She is believed to have gone out without a jacket, keys or money.
Mrs Harris is described as black, 5ft 4ins, of slim build, with grey hair in a ponytail.
She was last seen to be wearing a light blue jumper, a white blouse with a bow at the neckline, and a beige skirt which falls below her knees and has buttons running down the front.
It is understood that Lurline also has a black handbag in her possession which contains the details of her son along with a Freedom pass registered to her.
Mrs Harris has wandered off on three previous occasions. The most recent being in September 2013 when she was found in Chichester by police.
She has also previously been found in Enfield Town and Walthamstow Market.
Police believe Mrs Harris is not believed to be going to places of any relevance, but merely getting on a bus or train to a destination and continuing to travel in this way until she is found by police or a member of public.
Officers are urging anyone with information on her whereabouts to call police on 101 or Missing People on 116000 quoting reference 14MIS020453.