The data processing from both JET Neutral Particle Analysers (NPAs), high energy and low energy detector systems, has been updated for needs of operating in different scenarios with several isotopes in tritium and deuterium plasmas in the 2021 campaigns. The new automatic processing allows quick routine analysis of NPA data during JET experiments and enables efficient further analysis of large data sets with the help of coupling to the JETPEAK database. The analysis of the NPA data can be now performed as a standard way reliably in intershot and avoid misunderstanding and misusing the data. The NPA data analysis workflow has been systematically applied and demonstrated during scenario development experiments in 2020. This contribution introduces the capability and efficiency of the coupled analysis chain in fast particle diagnostics data checks and post-processing by using JET DTE2 reference pulse sub-database.