CCTV images of a man who has been missing for more than a month have been released by police.

Stuart Clark, 59, was last seen at a friend's house on Park Road in Clydebank, West Dunbartonshire, on Sunday, January 17 around midday.

His friends and family are said to be 'extremely worried' about him.

The images show Mr Clark on the train between Cardross and Dalmuir on the same day he went missing around 11.45am.

Police have spoken to hundreds of members of the public who frequent the local area to glean more information about Mr Clark's whereabouts.

Anyone with information has been asked to call Police Scotland on 101.