A continuous survey of household expenditure, food consumption, and income. It replaced the Family Expenditure Survey and the National Food Survey in April 2001. Its primary aim is to provide information about spending patterns for the retail price index, and about food consumption and nutrition. Other uses of the EFS include the estimation of consumers' expenditure for the national income accounts, and as an input in to tax–benefit modelling. It is an important source of economic and social data for government and other research agencies.
http://www.statistics.gov.uk/ssd/surveys/expenditure_food_survey.asp The home page of the survey.