Inquests into the deaths of the seven people killed in last Friday's major pile-up on the M5 are due to open later.
The hearings will take place at Taunton's Old Municipal Buildings after post-mortems were completed earlier in the week.
Transport Secretary Justine Greening confirmed that 51 people were injured in the 37-vehicle pile-up and that it might take weeks before the authorities can determine what caused the accident.
One theory being considered by police is that smoke from a nearby fireworks event could have caused the accident.
The accident claimed the lives of lorry drivers Terry Brice and Kye Thomas, father and daughter Michael and Maggie Barton, grandparents Anthony and Pamela Adams, and battle re-enactor Malcolm Beacham.
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