The newly-appointed BBC Director-General Tony Hall said, "It takes a lot to drag me away from the Royal Opera House ... but the reason I stand before you today is that I care passionately about the BBC, about what it can do, it's programme makers and the impact we have in all different ways".
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Dr Michio Hirano denied having any financial interest in the experimental treatment considered for the baby.
The measures are set to be included in a court-mandated clean air strategy the Government is due to publish on Wednesday.
Low pressure in the Atlantic brings a spell of wet and windy weather on Wednesday.