The Princess appeared in a sophisticated outfit, blending brown and burgundy tones, showing elegance and intimacy. She wore a brown checked coat by Blas Milano over a burgundy maxi dress, chocolate brown heels and carried the brand's small Morgan handbag in Cranberry. Today, she also introduced a pair of classic Trinity earrings by Cartier.

The outfit not only highlighted her excellent fashion sense but also conveyed a message of strength and grace. Upon arrival, Catherine was greeted by the medical team who supported her during her treatment. She expressed her deep gratitude, saying: "The care I received here was outstanding, it was a pleasure to come back and thank the dedicated staff."

During her visit, the princess spoke to chemotherapy patients, encouraging them with words of encouragement and sharing her own experiences. She stressed the importance of staying positive, saying that recovery is a gradual process and that it is important to be kind to yourself.

Catherine also spoke about the wider impact cancer has on families, stressing that support from loved ones is invaluable during difficult times. Her reflections highlighted the holistic nature of the healing process, including the emotional and psychological aspects.

It was announced that she would join her husband, Prince William, as co-patron of the NHS Royal Marsden Foundation, a role previously held only by Prince William and also held by his mother, Princess Diana. The decision continues the Royal Family’s commitment to supporting advances in cancer treatment and research.

The Princess’s visit also highlighted the importance of looking after herself and her health during recovery. She shared personal memories of managing the long-term side effects of treatment, candidly mentioning times when words were lost, reflecting on the cognitive challenges that can be encountered during recovery.

It was Catherine’s first major public engagement in over a year, symbolising her strength and commitment to her royal duties. Her presence at the hospital not only lifted the spirits of patients and staff, but also drew attention to the vital work in cancer care.

As co-patron, she will play a key role in advocating for patient support services, early detection initiatives and research funding. The Royal Marsden Hospital, renowned for its pioneering work in cancer treatment, has a long-standing connection with the Royal Family. Catherine’s involvement is expected to raise the profile of the hospital and strengthen its mission of providing first-class care.

Her personal experience with cancer adds a depth of empathy and understanding to her role as patron, attuned to patients and families facing similar challenges. In the coming months, the Princess of Wales is expected to be involved in a number of initiatives aimed at raising awareness of cancer prevention and survivorship.

Her advocacy promises to inspire many, reinforcing the message that with support, determination and access to quality care, recovery is possible. Catherine's surprise visit to the Royal Marsden Hospital demonstrates her unwavering commitment to service, compassion for those in need and determination to use her platform to make a positive difference in healthcare.