This report outlines the context, methods, data, and findings of the Arts and Humanities Research Council funded project British Ritual Innovation under Covid-19 [BRIC-19]. The project ran from August 2020 to September 2021, with the aim of documenting and analysing changes to British communal religious life during the Covid-19 pandemic and associated lockdowns, and of providing best practice recommendations for religious communities adapting their practice to address similar crisis situations in the future. Particular effort has been made to include data that reflects, to the extent possible, the geographic and religious diversity of Britain, by focussing on questions of religious practice rather than on theological questions or issues of belief which are specific to faith traditions. The full context of the project, along with a detailed discussion of the research methods used, is contained in the introduction.