The flight path over Portman Avenue where the body was found, around 10 miles from Heathrow, is where the planes opens their undercarriage and lower wheels ready for landing.
A Metropolitan Police spokesman said: ‘We were called to reports of a dead body found in the road. He was pronounced dead at the scene.
‘We are still waiting on the postmortem results and an identification. One line of inquiry is that he was a possible stowaway on a plane.'