The Duchess was in royal blue for this morning's visit to the Tower of London with Prince Harry and Prince William. Above the group is welcomed by the General, the Lord Dannatt (Photo: Tower of London Facebook page).

They were at the Tower to see the spectacular "Blood Swept Lands and Seas of Red" art installation. The exhibit is part of the World War I Centenary observances.

Duke And Duchess Of Cambridge And Prince Harry Visit Tower Of London's Ceramic Poppy Field
With yesterday's events in Belgium top of mind it is staggering to think each of the poppies represents a British or Colonial fatality from the War. Hundreds of thousands have been 'planted,' by volunteers, but there are thousands more to plant: ultimately 888,246 ceramic poppies will fill the dry moat.

Kate William and Harry at the Tower of London Poppies
Each of the royals was given a poppy to plant.

Duke And Duchess Of Cambridge And Prince Harry Visit Tower Of London's Ceramic Poppy Field
As many readers will have quickly recognized, Kate was in her 'Detroit' dress by LK Bennett. The frock has been reissued: it is available in limited sizing on the US/Canada website ($395); the size selection looks more robust on the UK/INTL (£225) site.

Kate Middleton LK Bennett Detroit Dress
The Duchess was in a new pair of Jimmy Choo heels, the 'Georgia' style in navy suede.

Kate Middleton Jimmy Choo Georgia Pump
The most striking design element in the new shoes for many of us chatting on Twitter: the thicker heel. Not only is the heel wider than what we often see the Duchess wearing, it is about 1″ shorter than Kate's usual height, measuring only 3.5″ (90mm). Both features make eminent good sense if one is going to be walking on grass as Kate was today. More from the product description:

These column shaped heels are a stylish alternative to super skinny stilettos. The rounded toe shape works in perfect harmony with the chunkier heel which will keep you comfortable on your feet. Heel measures 90mm/3.5
The shoe is also available in Blush Leather ($625) at Jimmy Choo, as well as Black Patent Leather ($499) at multi-brand retailer Net-a-Porter. Kate accessorized with her Stuart Weitzman for Russell & Bromley 'Muse' clutch. There was also a new piece of jewelry today, a necklace by Mappin and Webb.

For more from What Kate Wore, click here and look through the gallery above for more photos of the royals at the Tower of London today.