The Royal Marsden Hospital

In 2005, William worked in the children's unit at The Royal Marsden Hospital for two days of work experience; he also assisted in the medical research, catering, and fundraising departments. In May that year, he spent two weeks in North Wales with a mountain rescue team. In May 2007, William became a patron of both organizations—his mother had also been a patron of the Royal Marsden Hospital—and he became attracted to Mountain Rescue England and Wales to "highlight and celebrate the vital, selfless and courageous work of our mountain rescue organizations".