Britain's Prince William met patients receiving pioneering new treatments at a specialist cancer hospital.
The Duke of Cambridge was given a two-hour tour of the Royal Marsden NHS Foundation Trust's research facilities in Sutton, south London to learn about their work developing new treatments for cancer.
The 33-year-old royal was shown state-of-the-art laboratories at the Centre for Molecular Pathology and met with patients undergoing clinical trials in the West Wing clinical research centre.
He spoke to both doctors and patients to learn more about the treatments and research offered at the hospital.
Upon arrival the Duke was greeted by a group of children from the Royal Marsden nursery wearing paper crowns.
William also hosted a dinner for The Royal Marsden Cancer Charity at Kensington Palace.
He became President of the Royal Marsden in 2007, following in the footsteps of his late mother Princess Diana, who held the position from 1989 until her death in 1997.
The Duke previously carried out two days of work experience at the hospital's children's unit in 2005 and he and his wife, Duchess Catherine opened the trust's cancer unit for children and young people in 2011.