On her first day in post, Meri Huws says her role is about protecting the rights of Welsh speakers.
She says she will use her enforcement powers if necessary, but says her target won't be small businesses in predominantly English-speaking areas, the proverbial 'Chepstow chip shops.'
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Any showers will ease through the evening to leave a mainly dry night with clear spells and light winds.
A coroner says that the family of a 15-year-old girl, who died after falling from a bridge, was let down by health authorities.
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