The NEA International Criticality Safety Benchmark Evaluation Project (ICSBEP), Shielding Integral Benchmark Archive and Database (SINBAD), and International Reactor Physics Experiments Evaluation Project (IRPhEP) technical review groups were set up to compile and evaluate critical, subcritical, shielding and reactor physics experimental data, into standardised benchmarks published within handbooks. These handbooks allow scientists to use experimental data for the validation of calculation tools and nuclear data libraries. The Technical Review Groups for these projects met during the week of 21 October 2019, with 45 participants from 12 member countries who reviewed six new series of experiments for the ICSBEP Handbook, three series for SINBAD and five for the IRPhEP Handbook. Experimental data contained in these handbooks has been generated at the cost of billions of euros, and through the efforts of the technical review groups, these data can be used by NEA members to enhance the modelling and simulation tools used to design nuclear systems.