In this special episode, we look at an important new survey from Unions21 into how unions can use data.  Report author Tom Hunt reminds us that, like death and taxes, data has always been with us.  But effective use of data not only leads to better decision making, but also sets the stage for wholesale cultural change in unions, driving improvements in organising, servicing and governance based on evidence-based allocation of resources and investing in a sharing-based rather than silo-based way of working.  With case studies from Linda Kelly (Forsa) and Melantha Chittendnen (Community).  Companion blog here.  Music by Scott Holmes.  A Makes-You-Think production.