Northamptonshire Police have launched an appeal for help in finding Alan who was reported missing from the Woodford Halse area.
Alan was last seen wearing light grey jogging bottoms, a black hoodie/coat and black trainers.
He is described as a white male, approximately 6 feet tall with a stocky build, with light brown short hair.
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Police are concerned for Alan and urge anyone who sees Alan to make contact with police on 101 and quote - MPD1/195/22.