Iceland's Met Office has lowered the risk level of an eruption from its Bardarbunga volcano from red to orange.
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Drivers of the most polluting vehicles will pay the new £10 T-Charge, meaning a daily payment of £21.50 to enter central London.
It is estimated there are 50,000 alcohol-related hospital admissions a year, costing the Welsh NHS £120m annually.
A rather cloudy start for most, with rain spreading eastwards, clearing to brighter skies later in the day.