Officers leading the search for Anthony Ward now have serious concerns that the 70-year-old may have come to serious harm.
Anthony was last seen in Main Street, Morton, on Thursday, August, 2.
He was recently diagnosed with early onset dementia, adding to the concerns about his safety.
Anthony, who goes by the name Tony, is 5ft 7ins tall, of slim build and has greying hair. He was last seen wearing a dark jumper and dark coloured trousers.
Tony has links to the Belper area, where he previously lived, and is also a keen walker.
Anyone with information in regards to Tony’s disappearance should contact police, quoting incident 445-030818.
You can also call Crimestoppers anonymously on 0800 555 111.