The number of people aged over 60 years worldwide is projected to rise from 605 million in 2000 to almost 2 billion by 2050, while those over 80 years will quadruple to 395 million. Two-thirds of UK acute hospital admissions are over 65, the highest consultation rate in general practice is in those aged 85-89 and the average age of elective surgical patients is increasing. Adjusting medical systems to meet the demographic imperative has been recognised by the World Health Organisation to be the next global healthcare priority and is a key feature of discussions on policy, health services structures, workforce reconfiguration and frontline care delivery.