During the -94/95 JET Divertor Task Force Campaign impurities where injected into the plasma for divertor studies, and at the end of the -97 Campaign experiments for ITER Physics provided vast quantities of He in the vessel. These shots have been used for impurity transport studies using the Charge Exchange Spectroscopy diagnostics where simultaneous measurements of several ion species allow an iterative procedure for the beam attenuation calculation and their densities [1]. The impurities are detected from charge exchange between the fully ionised desired ions and the neutral beam injection, using several multi-chord Czerny-Turner spectrometers viewing the plasma in 13 radial points horizontally from the centre to the edge. Using measurements from the well understood Carbon VI spectra, ion temperatures and densities for other impurities have been derived. The diffusion as well as convection velocity was then investigated for He, N and Ne in H-mode steady state plasmas. Comparisons made with the Neo-classical transport theory verifies a clear correlation between the experimentally obtained diffusion coefficient D and the ion temperature Ti.