Kate Middleton has inadvertently shown off her remarkably flat post-baby tummy during an official engagement.
The Duchess of Cambridge was the guest at a Sportaid athlete workshop at the Queen Elizabeth Olympic Park in London yesterday.

And the 31-year-old royal proved she was a good sport by getting stuck in for a spot of volleyball on her first solo appearance since [uuid=641b3380-09b0-41a7-abdd-6a4942871d01]Prince William.