A summary is given of a Technical Meeting assembled to review the status-of-affairs in experiments, models and nuclear data associated with the determination of the anti-neutrino flux and spectrum as produced by reactor neutrinos. Participants discussed the latest experimental results in measurements and models and recommended future improvements in the data analysis, nuclear model corrections and nuclear decay data. There was overall consensus that the field of reactor neutrinos would benefit from international coordination in the form of an international working group. Details of the discussions and the proposed actions are presented in this summary report.