Police warn hailstorms causing problems on M40
Police have urged drivers to slow down because of "challenging" driving conditions caused by hailstorms.
Thames Valley Police said "slippery" stretches were affecting the M40 between junction 5 at Stokenchurch and junction 6 at Lewknor.
The M40 between junctions 4 and 5 was also closed due to a collision at about 09:00 GMT leading to long delays, according to National Highways.
The road was reopened at about 09:45.
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