The Understanding Society Covid-19 study is built upon Understanding Society: the UK Household Longitudinal Study, and uses frequent web surveys to capture the experiences and behaviours of the UK population during the Covid-19 pandemic. Understanding Society is the UK's main longitudinal household survey, and one of the largest household panel studies in the world. It began in 2009 but carries on from (and incorporates sample from) the earlier British Household Panel Survey. The first part of this talk will describe the design and implementation of the Understanding Society Covid-19 web survey. The second part of the talk will discuss issues around ensuring reliable population inferences from these data. Thirdly, preliminary results from Wave 1 of the survey will be presented, focusing on distributional aspects of the economic consequences of the pandemic and associated stay-at-home policy.