"But as adults we have maturity and life experience to help us advocate for ourselves and cope with challenges.

"We can seek help if we need it and most importantly our voices are, sadly, often taken more seriously."

Sarah, who is patron of the trust, said that teenagers and young people in general are a group that she feels is "consistently neglected by those developing health plans and policies" when it comes to cancer care.

The trust's campaign launches today with an open letter to Health Secretary, Wes Streeting, and will ask for teens to be considered in the National Cancer Plan for England.

Fergie, as she is affectionately known, will join her daughters today, Princess Beatrice and Princess Eugenie, for a visit to a cancer unit supported by the trust.

The outlet said that research from 2023 found that nearly half of teenagers and young adults diagnosed with cancer had to see their GPs more than three times before they were referred.

Kate Collins, TCT chief executive, said: "Cancer is different for teenagers and young adults … yet they’re often overlooked.

"That’s why we’ve launched our #AndYoungPeople campaign, urging the government to listen to the unique needs of young people with cancer."