chapter 8 related official statistics comparison of dietary surveys as well the expenditure and food survey national diet nutrition collects data on consumption also health for england scotland collect fruit vegetables estimates intake vary across due to differences between in population covered method collection may be united kingdom or all people adults children varies from diaries household 24 hour recall what was consumed each has its merits previously quantities purchased both purchases drink eaten out are based standard portion sizes nutritional content is obtained by converting into nutrient intakes profiles type allowance being made wastage strengths produced every year go back 1940 can analysed geographical area