One fan wrote on X: “The very happy Duke and Duchess of Edinburgh are attending RWHS - Day 3. Really love these two.”

Another said: “A great looking couple!”

Fans have also been sent into a frenzy over Sophie’s outfit, with the duchess wearing a Ghost London Aueline Moon-Print dress and a Isabel Marant Loyana Jacket.

The duchess accompanied this with a Sophie Habsburg Paloma bag and TOMS Valencia Canvas Platform Espadrilles shoes.

One fan wrote: “I love this red dress.”

Another said: “She's a winner from head to toe. Love the red dress, that makes the outfit pop. Beautifully accessorized.”

A third wrote: “Love the dress and her whole look.”