We have recalculated the MHD stability of a JET discharge in the diagnostic optimised configuration. Previous results using the MISHKA-I stability code have shown that the reconstructed equilibrium of the experiment lies in the stable region against low to intermediate n peeling-ballooning modes after the ELM crash, and in the unstable region just before the crash. More detailed stability analysis using the ELITE code has been carried out in this study, and good agreement with previous results has been found. The stable region in s-a space gets narrower for higher n values.