The main goal of SNO+ is to search for the process of neutrino-less double beta decay, the golden channel to determine whether neutrinos are Dirac or Majorana particles. The ultra-low background liquid scintillator detector, located 2 km underground in an active nickel mine in Canada, is also able to measure anti-neutrinos from nearby reactors, and solar neutrinos, to improve our understanding of neutrino oscillations. It also provides sensitivity to geo-neutrinos and Supernova neutrinos. The EPAP group is involved in many aspects of SNO+ analysis, with a focus on characterisation of potential backgrounds, and has a leadership role in the experiment.