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The air ambulance, police and paramedics were called to a busy high street yesterday afternoon to reports a man had collapsed.
The air ambulance landed on the Great Lines Heritage Park at the corner of Marlborough Road and Brompton Road.
A police spokesman said the ambulance service requested their assistance while they dealt with a man having a medical episode.
The man had had a heart attack and suffered injuries to his head. He was flown to William Harvey Hospital, Ashford.
A passerby said there were three ambulances and several police cars, and that other members of the public had told him there is a man on the ground.