Princess of Wales wears £549 Holland Cooper blazer for second time

For her outing, the mother-of-three opted to wear her Holland Coopr double breasted blazer in the colour "brown herringbone"

The £549 item has only been worn by the royal once before, when she travelled to the Isle of Mull with Prince William.

Catherine complemented the blazer with a new pair of Veronica Beard trousers, which retail for £398.

To accessorise, the princess donned £3,200 Cartier Trinity earrings.

Since last January, when Catherine wore them on a trip to the Royal Marsden Hospital, the jewels have become a staple in her wardrobe.

They were last worn at Charing Cross Hospital on January 8, and the Princess of Wales additionally chose to wear them on Christmas Day.

During today's outing, the 44-year-old met a young girl whose therapist was helping her make a “box of wishes” and showed her how to “listen to the sea” by holding a shell to her ear.

Catherine said: “Sometimes if you put them to your ear, you can sometimes hear the sea. Do you want to see if you can hear the sea?

“Sometimes you can hear the waves. If you listen very quietly.

“That’s what I like doing with shells. If you close your eyes, you can sometimes imagine you’re by the beach.”

The girl replied “yes” when the princess asked if she could hear the waves.

She showed Catherine a “potion” she had made that would keep “the bad dreams” away.

The Princess of Wales told the girl’s mother: “Lots of people need more of these.”

The therapist said she had also chosen some feathers for the box to keep the girl’s “busy head” calm.

The girl’s mother said her daughter had “loved” meeting Catherine, saying: “I don’t know how I’m going to get her back after this. She’s very busy-minded; she’s normally covered in slime.”

Describing how the centre had helped her family cope with their trauma, the mother said: “You always think when something like that happens, don’t mention it to (the children), but they’re supposed to speak, otherwise they just repress it.”

Catherine is a patron of Family Action, a national charity which helps children aged four to 18 and their families recover from trauma.

They work with families that have experienced adversity, abuse and traumatic bereavement.

The princess also met a 12-year-old boy who described using music during his therapy sessions, and told her how he now plays the drums in a school band because he loves instruments “I can smack”.

Catherine said: “Exactly, and that’s a fantastic way to express yourself and also manage really difficult and hard feelings that are sometimes harder to express with words.”