Part of the investigation is centred around a vehicle which collided with a Royal Mail van on the A419. A Wiltshire Police operation is currently taking place.
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James Wright has Monday's forecast for the east of the ITV Meridian region.
James Wright has Monday's forecast for the west of the ITV Meridian region.
Santa is not the only one who has an epic journey to make on Christmas Eve. A Sussex man is to cycle 500 kms to raise money for charity.