In these sessions, we will explore cells sorting by flow cytometry. This is an extremely useful technique as it allows us to separate cells of interest for further study. However, the success of a sort depends on many factors including the sample preparation and knowledge of how the sorter works. On 12th February we will look at the theory of cells sorting and perform a simple sorting experiment using a Sony SH800 cell sorter; in the session on 12th March we will consolidate that knowledge and use a BD FACSAria to perform a more complex cell sort. The aim of both sessions is to show attendees the theory of cell sorting but also the practicalities of performing a successful sort. These webinars are a collaboration between Derek Davies (The Francis Crick Institute, London, UK), and Kathy Daniels and Rui Gardner (Memorial Sloan Kettering Cancer Center, New York, USA).