This document discusses a digital exclusion heatmap created by the organization doteveryone.uk to help politicians, citizens, local authorities, and organizations understand data on digital exclusion. The heatmap was piloted in two London boroughs, Croydon and Lewisham, to test reaching difficult groups and demonstrate what addressing digital exclusion is possible. The goal is for the heatmap to serve both as a tool and example of how addressing digital exclusion can help people.