There are increasing concerns about the future availability of informal care for older people, particularly care by their children. This article explores past trends in the provision of informal care by children/children-in-law between 1985 and 1995 in Great Britain, using successive General Household Survey data. The article suggests that, during this period, there was a decline in co-resident intergenerational care and that this was associated with a decline in highly intensive intergenerational care. The article explores possible factors underlying these trends, in particular, demographic changes and changes in patterns of formal care for older people.