Leaving twin is unthinkable' says woman, 24, with six months to live

Leaving her twin behind is unthinkable, Caitlin Leggett says, and that conviction drives her to seek potentially curative treatment abroad. The 24-year-old Cardiff woman was diagnosed with acute myeloid leukaemia in April 2025, underwent chemotherapy and a December 2025 stem cell transplant, and achieved remission before a relapse was detected in May 2026. With just six months to live on her current plan, she has launched a fundraising campaign targeting £500,000 for treatment in the United States, where costs could be substantially higher. Caitlin's twin sister Grace has returned from Bristol to Cardiff to support the family, underscoring the personal stakes of their bid for time.