Cameron: 'We've got to do better on dementia care'

Six months ago, I set up this challenge to say we've got to do better as a country in three vital regards.

First is how do we treat people with dementia in the health service, in care homes? In some cases it's brilliant, in many cases it's not good enough.

What more can we do in society to show understanding for people with dementia and make sure we treat them properly?

Third, but I think almost the most vital, is putting more money into dementia research.

I think there a lot of people out there who think dementia is just part of ageing, part of getting old. It isn't. It's a disease of the brain. We've got about 670,000 people with dementia, but tragically only 40% - less than half - know they've got it.

We are not diagnosing it fast enough, we are not treating it fast enough. But there's a really big cultural change we need to make. We know cancer is a killer that we want to get on top of. We need to think of dementia in the same way. This is a disease that we need to try and tackle with all our brains and brilliant scientists.