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A road has reopened after a man fell from a block of flats.
Prince of Wales Terrace by Deal Castle was cordoned off for around three hours while emergency services deal with the incident at Queens Flats.
It's understood a fisherman witnessed the man tumble to the ground before raising the alarm at about 2.30pm.
An ambulance spokesman said: "We responded to reports a man had fallen from height, believed to be an industrial accident.
"He suffered serious injuries and has been taken by road to William Harvey Hospital in Ashford with a plan for the air ambulance to take him on to Kings Hospital in London."
David and Dorothy Court were walking along the sea front when they claim to have heard a noise.
Mrs Court said: "We both looked up thinking it was a flowerpot that had fallen and then the fisherman from across the road ran across shouting 'Oh my God!"
"My husband tried to get the ambulance but he couldn't get a signal but the fisherman got it."
The patient, who eyewitnesses say was a window cleaner, is understood to have fallen behind a brick wall onto an area not visible from the promenade.
The couple say another passer by clambered over the wall to sit with the casualty, with the first emergency service vehicle arriving within five minutes.
Mrs Court added: "If we had been the only one's here and hadn't noticed, he could have laid there and nobody would have known."
Traffic is building around the town as motorists are directed away from the scene.
A spokesman said: "Police were called to Ranelagh Road, Deal at 2.28pm on Monday, 4 March 2019 following a report of an industrial accident.
"South East Coast and Kent Fire and Rescue Service were also called to the scene.
"The surrounding roads have been closed whilst officers worked at the scene."
A woman died after falling from the same block of flats in April last year.