The Smoking, Drinking and Drug Use among Young People surveys began in 1982, under the name Smoking among Secondary Schoolchildren. The series initially aimed to provide national estimates of the proportion of secondary schoolchildren aged 11-15 who smoked, and to describe their smoking behaviour. Similar surveys were carried out every two years until 1998 to monitor trends in the prevalence of cigarette smoking. The survey then moved to an annual cycle, and questions on alcohol consumption and drug use were included. The name of the series changed to Smoking, Drinking and Drug Use among Young Teenagers to reflect this widened focus. In 2000, the series title changed, to Smoking, Drinking and Drug Use among Young People. NHS Digital (formerly the Information Centre for Health and Social Care) took over from the Department of Health as sponsors and publishers of the survey series from 2005. From 2014 onwards, the series changed to a biennial one, with no survey taking place in 2015, 2017 or 2019.In some years, the surveys have been carried out in Scotland and Wales as well as England, to provide separate national estimates for these countries. In 2002, following a review of Scotland's future information needs in relation to drug misuse among schoolchildren, a separate Scottish series, Scottish Schools Adolescent Lifestyle and Substance Use Survey (SALSUS) was established by the Scottish Executive. The 2023 Smoking, Drinking and Drug Use among Young People survey is the first in this series to be carried out using electronic data collection within the classroom setting, rather than paper and pencil.The methods for constructing each derived variable are available in the Smoking, Drinking and Drug Use GitHub code repository (file derivations.py). Social behaviour and attitudesHealth behaviourDrug abuse, alcohol and smokingConsumption and consumer behaviourYouth The survey collects information on the proportion of young people aged 11 to 15 who smoke, drink alcohol or take illegal drugs. It includes information on: prevalence of smoking, drinking and drug taking among school childrenuse of e-cigarettes and emerging drugstypes of alcohol and drugs takenhow often pupils smoke, drink and take drugswhere pupils obtain cigarettes, alcoholic drinks and drugspupils' attitudes to these behaviourspredictors of the likelihood of smoking, drinking and drug use among schoolfrom 2018, the survey also collects some information about well-being, and the relationship to risky behaviours