The A40 has reopened westbound after multiple crashes forced its closure today.
A woman driver was killed and as many as 15 people were injured on the Oxfordshire road before 10am.
Six vehicles were seriously damaged and a further 10 to 15 were also involved in collisions that stretched for more than half a mile.
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His representatives said Cassidy, who was hospitalised last week, died "surrounded by those he loved."
The company’s recently appointed Chief Executive Dara Khosrowshahi said the breach was made by two individuals outside the company.