Councils will be given greater freedom to introduce 20mph schemes under new government proposals to improve road safety.
Local officials will also have more scope to cut speeds on rural roads with a history of accidents and introduce variable speed limits outside schools as part of the updated Department for Transport guidance.
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A Met Office warning covering much of England and south-east Wales is expected to remain in place until 11am.
A band of cloud and patchy rain is expected across Scotland and Northern Ireland, moving southeast as the day progresses.
Charity warns an estimated 30 child refugees a day are being expelled from EU countries after crossing the border from Serbia.