From video description:

This talk, presented by the CAD & Technical Lead at the London Ambulance Service, will describe everything that happens between dialling 999 and getting to hospital, and all of the technology involved in triaging the call, dispatching the ambulance, and helping patients over the phone before it arrives. This isn’t a heartwarming human-interest story from the documentaries — this is the full ins and outs of all the systems, processes, and infrastructure that keeps people safe across a major city every day. We’ll explore how we use open data to find exactly where you are, exactly how we decide who gets help quickest and who must wait, and how your phone can help save your life.