The driver, a 42-year-old female ambulance technician, and the patient, an 88-year-old man, were pronounced dead at the scene.
A male crew member and a male relative of the patient remain in hospital both in a serious condition.
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Wednesday's weather for the east of the region
Wednesday's weather for the west of the region
Dorset's Weymouth Beach has been named the UK's best by travellers, with Fistral Bay, Cornwall, coming in second place.