Nicholas, also known as Nicky, was last seen in County Mall, Crawley, shortly before 5pm on Monday.

He lives in Surrey, but has links to Norfolk.

Nicky has links to Norfolk (Image: Sussex Police)

A spokesman for Sussex Police said: "Officers are concerned for his welfare."

He is described as 5ft 5ins tall and has short light brown hair.

Anyone who sees him is urged to contact officers at Sussex Police using the reference 1117 of April 7.

© Norwich Evening News