Do Not Pass Go - We're Walking for Dementia UK Dementia is the UK's biggest killer. Every three minutes, someone in the UK receives a diagnosis. One in three people born today will develop dementia in their lifetime – which means the chances are, someone you love will be affected. Right now, around a million people in the UK are living with dementia, and that number is set to reach 1.4 million by 2040. Target £600 Raised so far £833 £1,019 incl. Gift Aid