Author Heading Dementia Campaign
Author Terry Pratchett has handed in a petition to 10 Downing Street calling for an urgent increase in funds for dementia research.
The petition, which has been signed by 20,000 people, describes current level of funding as "appalling".
The campaign is backed by more than 100 top scientists.
The Discworld creator, diagnosed with a rare form of Alzheimer's disease this year, also met Prime Minister Gordon Brown and Health Minister Phil Hope.
The petition, addressed to Mr Brown, highlights that Alzheimer's and related diseases, which affect 700,000 people in the UK, currently receives just 3% of research funding.
The campaign is backed by more than 100 top scientists.
The Discworld creator, diagnosed with a rare form of Alzheimer's disease this year, also met Prime Minister Gordon Brown and Health Minister Phil Hope.
The petition, addressed to Mr Brown, highlights that Alzheimer's and related diseases, which affect 700,000 people in the UK, currently receives just 3% of research funding.