The American government's road-safety body has calculated that lane drift on motorways is responsible for 43% of all fatal accidents on highways there.

ECONOMIST: Clean machine

In Gwynedd, a couple were trapped in their car in a snow drift near Bala for 18 hours before being led to safety by rescuers at 08:00 GMT on Saturday.

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Wales may be the first major international team to have perfected the drift attack: flat, one-paced, ready for the hit and pushing for the safety of the touchline.

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