This document discusses Opencrisis.net, a UK-based organization that aims to coordinate crisis crowdsourcing and crisis mapping efforts in the UK and globally. It provides examples of how crisis mapping has been used in past events in the UK like London Tube strikes. It outlines Opencrisis.net's vision of creating a connected network of crisis response organizations and tools in the UK to facilitate situational awareness and two-way information sharing during crisis events. Finally, it lists some of the key response communities and tools that Opencrisis.net coordinates with.