Ella Pallister from Portesham in Dorset was competing near Dorchester on Sunday when she fell from her horse. The seventeen year old was flown to Southampton General Hospital, where she died.
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A further 85 buses are expected to arrive on Tuesday and Wednesday, with officials saying the entire operation will last at least a week.
The government will make an announcement about whether Heathrow or Gatwick should be awarded a new runway at 12.30pm today.
Tuesday morning's weather for the west of the region