The Safety Critical Systems Symposium, organized by the Safety Critical Systems Club will take place from 7th February to the 9th February 2017 in Bristol, United Kingdom. It brings together engineers and specialists from a range of disciplines working on safety-critical systems in a wide variety of industries, academics researching the arena of safety-critical systems, providers of the tools and services that are needed to develop the systems, and the regulators who oversee safety. It provides, through publications, seminars, workshops, tutorials, a web site and, most importantly, at the annual Safety-critical Systems Symposium, opportunities for them to network and benefit from each other’s experience in working hard at the accidents that don’t happen.