“All people who were admitted to hospital have now been released with no lasting ill effects.
“The group is able to reiterate its assurances to the public that no risk is posed. Any smouldering from the scene is a result of the burning paper and is not connected to chemicals.
“Work is progressing to get the people displaced from their vehicles to Corley Services Station back on the road.
“Our priority will then be to get the M6 open again.”
More top news
One of the young victims of the school massacre in Pakistan spoke to his cousin in Birmingham just hours before he was murdered.
Pictures show the completed construction of a sky-lit roof on the Mailbox.
CCTV footage shows the pair steal from a couple in broad daylight.