Oliver and Daniel Horne from Cirencester will present a home-made card to Prince Charlies congratulating him and the Duchess of Cornwall on becoming grandparents to the new Prince George.
The brothers will also hand the Prince of Wales a cuddly toy for the little Prince.
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The Maltings shopping centre was closed to the public after a small amount of the Novichok substance was found in the area.
Some sunshine with possible thunder storms.
Unsettled with sunshine and showers