These data were generated as part of an ESRC-funded research project examining the impact of the COVID-19 crisis on U.K. family home environments, including children’s health, psychological wellbeing, eating, physical activity and sedentary behaviours. The data include caregiver reported information provided as part of the telephone-administered Home Environment Interview (HEI) and child-reported questionnaire data. The HEI and child questionnaires were completed in three phases: T1 (November 2019 - March 2020), T2 (August 2020-March 2021) and T3 (April 2021-October 2021). These data were generated as part of an ESRC-funded research project examining the impact of the COVID-19 crisis on U.K. family home environments, including children’s health, psychological wellbeing, eating, physical activity and sedentary behaviours.