William and Kate began their day at the launch of the National Emergencies Trust at St Martin-in-the-Fields church in Central London.
The new independent charity will provide an emergency response to disasters in the UK, and has been set up after several terror attacks since 2017.
Kate was believed to be wearing a Women of the First World War poppy brooch worth £29.99 for at least the second year in a row.
Kate wore Princess Diana's glittering earrings at the engagement, pairing the dazzling diamond and sapphire drops with a cobalt blue dress.
The earrings, which can be adapted and worn as studs or as drops, are a favourite pair of Kate's and have been worn by the Duchess on a number of high profile occasions.
The Duchess plumped for a tailored blue fit-and-flare dress for the occasion, which featured a knee-length hemline and flattering 3/4 length sleeves.
The dress boasts a wide waist belt in the same colour as the dress, which served to accentuate the royal's svelte frame. Read more from The Daily Mail.