Police were called by the London Ambulance Service to Bushy Park at around 10.30am yesterday (December 8).
Paramedics performed first aid, however, the man died at the scene.
His next of kin have been informed.
The death is being treated by police as unexpected but not suspicious.
A Met Police spokesperson told Teddington Nub News: “At 10:35hrs on Monday, 8 December, police were called by the London Ambulance Service to reports of an unresponsive man in his 50s in Bushy Park, Richmond.
“Officers attended and paramedics performed emergency first aid, but sadly, the man was pronounced dead at the scene at 11:32hrs.
“His next of kin have been informed.
“His death is being treated as unexpected but not suspicious.”
