Journalist and broadcaster Andrew Neil has paid tribute to Michael Winner, saying that he "didn't suffer fools gladly", but also didn't take himself too seriously.
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Butterflies and nerves of steel were behind the images shared and seen by millions across the globe.
The Duke and Duchess of Sussex thanked everyone who took part in the celebrations on Saturday, Kensington Palace said.
Established in 1913, the flower show has become one of the world’s biggest showcases for horticultural excellence.