Camilla in tears as she takes ride in Chitty Chitty Bang Bang car for Chris Evans show

The Duchess pulled up to Hampton Court Palace in the iconic car early this morning, for the 500 Words creative writing competition final on BBC Radio 2’s live broadcast.

Chris Evans filled the driving seat and even asked Camilla for a rendition of a song from the classic Dick Van Dyke film.

Camilla laughingly brush off the request saying: “I cannot sing a note.”

The Duchess also admitted she “had a little cry” as she listened to finalist entries on the way to Hampton Court Palace.

Camilla told the live audience at Hampton Court: “On the way, I’m afraid to say you were right about a little tear and the mascara. We had a little cry.”

When asked about what she thought of the competition’s finalist, she replied: “Brilliant, all of them were brilliant.”

It is the fourth year Camilla has supported the short story competition as honorary judge.

The winning 500 Words entries were read out live on air by celebrity readers, including David Walliams, Dara O'Briain, Shobna Gulati, Jason Isaacs and Jim Broadbent.

During the broadcast there were live performances from John Newman, Sigala, Bastille, Alexandra Burke and the London Community Gospel Choir.

Camilla also gave a speech urging everyone to “keep saying a big fat yes to adventure” as the winners of the 500 words competition were announced.

The Duchess of Cornwall said: “I want to encourage everyone here to keep reading, to keep writing and keep saying a big fat yes to adventure.”

Camilla’s husband, Prince Charles will be joining his mother the Queen later today as Her Majesty officially opens the Queen's Diamond Jubilee Galleries at Westminster Abbey.

The galleries tell the story of the place of worship in four themes: building Westminster Abbey; worship and daily life; Westminster Abbey and the monarchy; and the Abbey and national memory.

The displays feature 300 treasures from the Abbey's collection, many on display for the first time.

The Queen and Charles will be given a guided tour of the area and be shown historical artefacts including an original 13th-century altarpiece from King Henry III's church.

The Galleries will be open to the public from Monday.

Earlier this week, Camilla joined the Queen is attending the 10th anniversary celebrations for the Medical Detection Dogs charity, which the Duchess is patron of.

Her Majesty was photographed stepping out of a black Land Rover wearing a gorgeous mauve coat and white gloves.

The beaming Monarch, who is known for her love of corgis, was greeted by one of the charity’s dogs as the pair arrived at the Royal Mews.