The cull was delayed after farmers said they may not be able to kill enough of the wild animals to make the scheme effective.
It had also emerged there were more badgers in the cull areas in Somerset and Gloucestershire than previously estimated, meaning that more would have to be killed to meet the 70% target needed for the programme to be effective.
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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.