Explaining Cameron's Catastrophe uses expert analyses of hundreds of surveys and focus groups run by Ipsos MORI to make sense of the UK's 2016 EU referendum: how we got here; the context, content and process; lessons from 1975; what remain did wrong; why the leave campaign was so successful; voters attitudes; and the aftermath. They also show what the 2016 referendum result, and life without the EU, means for the future of the UK.