Last year Prince Charles and Prince William joined financial brokers in fancy dress to raise money for charity, this time it was Camilla, the Duchess of Cornwall's turn.
Refraining from wearing fancy dress herself, she still got into the spirit of the day, meeting and greeting clowns and bears and trying her hand at some share trading.
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Camilla was making million-pound deals over the phone, with all proceeds from her wheeler-dealing going to charity.