Fire and ambulance crews were called to Julian's Bridge in Wimborne in Dorset at around 12.30 am following reports that a man had fallen into the river.
By the time they arrived the man had been helped to the river bank by a friend. Using a spinal board ambulance crews took the man to hospital.
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The Airports Commission is to publish its report and recommendations on whether an extra runway should be built at Gatwick or Heathrow.
Wednesday morning's weather for the east of the region
Wednesday morning's weather for the west of the region