Have you seen 45-year-old Darren Smith?
Officers are concerned for his safety after he was last seen in the Sutton area on September 15.
Darren is around 5ft 7ins tall, of slim build, with short grey hair and a beard.
It is not known what he was last seen wearing.
If you have seen Darren, or have any information about his whereabouts, call 101 quoting incident number 208 of September 15.