As I understand it the Alzheimer's Society are interested in folks eventually donating their brains as it will allow the 'scientists' to get a bit of study on the donor's lifestyle BEFORE they die. The article doesn't explain that dimension which is a pity as that's the point. So if you are 60 years + why not?
Oh yes, Mr Blunkett, he's been a good friend to the Alzheimer's Society and................ sorry...........what was the question again???