Reader Phil Dennett took this photo at about 2.30pm of the helicopter taking off at Worlds End Recreation Ground near Manor Road.
“There was a crowd of about 40 people watching,” he said, adding that it lifted off from a football pitch.
Richard Airey from South East Coast Ambulance Service said: “The air ambulance landed to assist us at a call to a nearby private address.”
But he said he could not comment further due to patient confidentiality.