Authorities said in a release that the assault took place as the victim walked through Briset Park, in Eltham, shortly after midnight and was reported to police later that day. A statement on Twitter is calling for any information to be reported.

       It reads: “Police are appealing for information after a man was sexually assaulted in a south London park on New Year's Day.”

       It adds: “The man in his 60s was attacked by two men as he walked through Briset Park shortly after midnight on January 1st. It was reported to police later that day.”

       Police said: "The victim, a man aged in his 60s, was attacked and sexually assaulted by two men as he walked through Briset Park, SE9, shortly after midnight on New Year’s Day (January 1).”

       Detectives are urgently appealing for information to anyone who might have witnessed the incident or can assist in their inquiry.

       A Met Police spokesperson said: "Were you at Briset Park just after midnight on New Year’s Day? Do you live in the area and perhaps have a security camera or doorbell footage of two men in the area at around midnight?"

       Police urge anyone who has information relating to this incident to call 101 or tweet @MetCC quoting CAD 4988/01JAN. To remain anonymous contact Crimestoppers on 0800 555 111.