DETECTIVES have released CCTV of a man they would like to speak to following a robbery in Northwood.

Two men, who had been chatting online, arranged to meet 3am on Tuesday, July 18, at Northwood Recreation Ground.

They spent the next few hours talking and walking around the grounds before making their way to the wooded area behind the recreation ground, where they sat on a bench.

They continued talking on the bench before heading further into the wooded area where they engaged in consensual sexual activity.

The victim, aged in his 50s, was semi-clothed when the suspect said: "Do you want to see my knife?"

The suspect then pulled out a small multi-tool, took out the small knife blade and pointed it at the victim.

The suspect then picked up the victim's trousers and one of his shoes before running off.

The victim tried to chase the suspect but he managed to escape. This happened at about 8am.

The victim had several personal items in his trousers, including bank cards, cash and a mobile phone.

Police have released this CCTV image from a local shop where an attempt was made to use the victim's bank card.

The man in the picture is described as white, aged in his mid-20s, with short dark brown hair and a trimmed goatee beard.

Det Con Jessica Allen, of Hillingdon CID, said: "The suspect spent hours gaining his victim's trust so he could leave him in a vulnerable position, making it easier to rob him.

"The victim feared for his safety during the incident, which has left him extremely distressed."

Anyone who recognises the man in the picture, or has information, should call Hillingdon CID on 020 8246 1791 or 101, or tweet @MetCC.

Information can also be reported anonymously to Crimestoppers on 0800 555 111 or online at crimestoppers-uk.org