Nonlinear MHD simulations with the JOREK code may be used to improve our understanding of Edge-Localised-Modes (ELMs). These H-mode related instabilities may cause some damage to the tungsten divertor of ITER, and it was demonstrated experimentally that the ELM energy losses increase with both machine size and decreasing collisionality. In sight of producing simulations of ELMs in ITER, in order to give some predictions of ELM size and divertor heat-fluxes in the future device, simulations first need to be quantitatively validated against experimental data of present machines. This paper presents simulations of ELMs in the JET tokamak, for the low-collosionality type-I ELMy Hmode Pulse No: 73569. The simulation results are compared to experimental data to provide a qualitative validation of simulations. This comparison comprises the dynamics of filaments and divertor heat-fluxes, the effect of resistivity and collisionality on ELM energy losses, and the observation of ELM precursors prior to the pedestal collapse.