All lanes of the M1 are now open after the accident involving five lorries between Junction 25 and 26.
The motorway is still congested with journeys between junctions 24 and 25 taking 40 minutes.
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The Government has previously described the new coin - which enters circulation tomorrow - as "harder to counterfeit than ever before".
Cloudier than on Sunday, but some brighter, sunny spells later.
A cloudier start, but turning dry, sunny and warm.