George, Charlotte and Louis 'guaranteed' to take up sporting challenge
Rachel Blackmore has taken up an ambassadorial role as the head of Ladies Day at the Cheltenham Festival
Prince Louis
Louis fiercely protects his chocolates after fan tells William: 'That's for Louis!'
The seven-year-old received a massive Lindor chocolate ball
Louis appears muted while siblings George and Charlotte join in with carols during service
The prince started the show holding his service book, but eventually had his hand in his pocket
