Camilla and Charles beamed at the crowds of well-wishes, who had lined the streets in the hope of catching a glimpse at the royal pair.
The choice to recycle an outfit was not a new one for the duchess, who also chose to wear a recycled frock to the Royal Ascot last week.
Opting for a mint green coat with a striking white hat trimmed with floral cut-outs at the first day of the prestigious racing event, Camilla was previously pictured wearing the same coat at a Buckingham Palace garden party in honour of Prince Charles’ 70th birthday last month.
Many believe the duchess is following in the Duchess of Cambridge's footsteps, who regularly chooses to recycle her outfits.
Related: Kate Middleton recycles Alexander McQueen dress at Royal Wedding