Welsh Government ministers will have the power to ban smoking in cars carrying children after a vote at Westminster.
The move's been welcomed by doctors' leaders but opponents say it would be difficult to enforce.
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Cloud and outbreaks of rain across parts of south Wales today. Elsewhere, it'll be mostly dry with some brighter spells.
Leaders of Wales, Scotland and Northern Ireland meet in Downing Street for talks with Theresa May ahead of Britain's departure from the EU
The prime minister has offered Scotland, Wales and Northern Ireland a "direct line" to Brexit Secretary David Davis.