A teenage boy with Asperger syndrome who has been missing since Saturday has still not been found.

Andrew Lincoln, 19, went missing from the National Autistic Unit of Bethlem Royal Hospital in Beckenham between 1.30am and 5.30am on August 17.

His concerned dad, Richard, told News Shopper this morning there was still no news on his boy.

In an appeal he wrote: "He could still be in the Bromley, West Wickham or Croydon areas.

"Andrew doesn't know the area, has no money with him, generally does not talk and due to the nature of his condition is unlikely to reach out to anyone for help - even when desperate."

He is described as being 6ft tall, skinny and wearing a dark coat and jeans.

His dad added: "He will have longer hair than these pictures and probably wearing a large black overcoat - usually hood up in all weathers to cover his face."

Anyone who sees Andrew is asked to ring the missing persons number 0208 649 0145 using the reference 19MIS032547.

It is important to note that Andrew currently has longer hair than the photographs in this story.