England's Chief Medical Officer has warned expanding waistlines have become normal and a tax on sugar may be needed to help the nation lose weight.
ITV News reporter Lewis Vaughan Jones reports:
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The town was where the US military and Kurdish fighters first united to defeat the Islamic State group four years ago.
MPs are expected to debate the deal on Saturday.
The duchess is expected to speak at the event, which will involve games, music and traditional Pakistani cakes.