The new figures show more than twice as many people in the UK have dementia before the age of 65 than was thought. It's estimated 42,000 people have young onset dementia (also called early onset dementia) - including thousands of cases among those in their 40s, and more than 700 cases among those in their 30s.
I am always immensely uncomfortable when anyone tries to put a monetary value on dementia, purely because I know that there is so much more to calculating the 'cost' of dementia than could ever be accurately represented by the use of pound signs. The emotional, all-encompassing, life-changing (and life-shortening) effects of dementia reach far and wide into every family affected.
I had one last thing to do in London before going home to my parents in Hampshire, and that one thing is to visit my mother-in-law. My MiL is in the grips of Alzheimer's disease. She does not recognise me. She lives in a world where her parents are still very much alive, where she still goes to work. I no longer exist in her world.
Dementia is a huge topic, encompassing many different aspects that stray into the territories of (in no particular order) healthcare, social care, science, community, family life, wider society, therapeutic practitioners, the voluntary sector, academia, finance, pharmaceuticals and yes, politics. 'Ownership' of it is hotly contested - it is a health issue, a care issue, something that governments must lead on or something that only the individuals living with it, and their families, truly understand?
We're living longer. In just the last two decades, average life expectancy has risen by four years. But living longer doesn't necessarily mean living healthier: half of these extra years of life are marred by pain and trips to the doctor due to chronic conditions like diabetes, cancer, joint pain, asthma, osteoporosis, stroke and heart disease...
When it comes to my great passion, dementia, the UK's major charities - Alzheimer's Society, Alzheimer's Research UK and Dementia UK - are all becoming household names. Interestingly though, when my story of my dad's life with dementia was unknown, it was a charity hardly anyone in the dementia world talks about who showed most interest in me.
Progress is urgently needed in understanding Alzheimer's disease and in finding effective treatments. Available drugs can help stabilise memory loss and confusion for a few months in about half of patients, but no preventative treatments exist and none that slow the inexorable development of the disease.