The family of Allan Bryant marked the fourth anniversary of his disappearance on Friday.

They have pledged to never give up the fight to find him.

CCTV footage showed him leaving the Styx nightclub in Glenrothes, Fife, on November 3, 2013.

It led to the region's biggest missing persons inquiry with high-profile appeals from both his family and police.

Searches were conducted throughout the area, however, there remains no trace of Allan, who would now be 27.

His father says he is convinced that someone knows what happened to him and has appealed for them to come forward.