The Chief Medical Officer for Wales is warning that we might need to consider new legal rules to control the size of fizzy drinks and food portions.
The move is being suggested as a way of stopping obesity levels reaching epidemic proportions.
Our correspondent Richard Morgan has more.
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Visitors to the centre can get a close-up look of the birds, which have been breeding in the area since 2004.
A public inquiry into undercover policing in England and Wales is to be formally opened today.