Hollow current operation scenarios realised in JET are accompanied by an increased drift of charged particles outwards from the current hole area. The corresponding enhancement of radial transport results in an essential degradation of alpha confinement in tokamak reactors as compared to traditional operation with monotonic toroidal currents. In the present study we investigate the effect of a toroidal current hole on the distribution function of fusion alpha particles as well as on the electron and ion power deposition profiles and on the alpha induced current in JET. Numerical results of predictive 3D Fokker-Planck modelling are presented for D-T fusion alphas confined in hollow current JET discharges.