Police are urgently appealing for help finding a missing 59-year-old.
Abdelali Slimani, from Southwark, has not been seen since 5am on Sunday, July 25.
He suffers from a number of medical issues including dementia.
Police say be may be struggling with his communication and mobility, and appear to be disoriented or confused.
He is described as 5ft 5in tall, of slim build, balding with some grey hair and grey stubble.
He may be wearing a blue shirt.
Officers believe he may be in the London Bridge area.
To report a sighting call 999.