Veteran newsreader Jon Snow, alongside actors Sir Jonathan Pryce, Suranne Jones, and Vicky McClure, has signed an open letter to Downing Street calling for an improved and earlier diagnosis of dementia.

The petition, backed by the Alzheimer's Society, has garnered over 60,000 signatures and demands a "bold and ambitious" plan to ensure individuals receive an accurate dementia diagnosis within 18 weeks of a GP referral, along with a subsequent care plan and access to appropriate treatment.

The Alzheimer's Society stated that similar ambitious targets have already been met for other major health conditions, including cancer and heart disease. The organization warns that the absence of a firm national target could lead to service cutbacks and prolonged waits, potentially diminishing the effectiveness of breakthrough treatments that are most beneficial in the early stages of the disease.

New research cited by the Alzheimer's Society indicates that many patients face diagnostic waits exceeding six months. A survey of over 1,000 UK carers of people with dementia revealed that nearly half (45 percent) waited more than six months for a diagnosis after first seeking help. Among those who had received a formal diagnosis, 46 percent reported that the diagnostic delay impacted their work, 35 percent found it harder to plan for the future, and 30 percent felt their lives were on hold.

Michelle Dyson, chief executive of the Alzheimer's Society, drew a comparison to diagnoses like cancer, stating it would be unacceptable for someone to be left to navigate next steps alone. "A dementia diagnosis can bring answers, understanding and access to the support, treatment and care that can make a real difference to people's lives," Dyson said. "But we know things can be so much better. Too many families spend months, and sometimes years, waiting for answers while their dementia progresses."

Jon Snow was diagnosed with Alzheimer's disease, the most common form of dementia, in 2023. The "Defeating Dementia" campaign, a partnership between the Daily Mail and the Alzheimer's Society, aims to increase awareness, promote early diagnosis, boost research, and improve care for the disease, which is Britain's biggest killer, claiming 76,000 lives annually.

A Department of Health and Social Care spokesperson commented that the government is committed to enhancing support for individuals affected by dementia and their caregivers. "We are bringing forward the timetable for Baroness Casey's commission on reform of the social care system, and we are appointing a new dementia tsar to help lead our work in that area," the spokesperson said. "We are also implementing a new action plan for unpaid carers."