Predictive modelling of a number of ELMy H-mode JET plasmas with a trace tritium puffing was done using a combination of transport codes JETTO and SANCO. The main aim of this analysis was to study the tritium particle transport and to compare it with the neo-classical one. Previous study of deuterium transport in JET ELMy H-mode showed, that at least the convective velocity was of the order of the neoclassical ware pinch for H mode plasmas. It follows from the neo-classical theory that both the diffusion coefficient and the convective velocity of trace tritium ions should increase with Zeff and with the main ion density. This should lead to a faster propagation of trace tritium towards plasma centre, which translates into a shorter time to peak in the measured neutron yield for these plasmas if transport is indeed neo-classical. The experimental evidence gives the opposite trend with a longer time to peak for high-density plasmas both with and without additional Argon gas puff. The empirical Bohm/gyroBohm model for anomalous transport is used in JETTO code to model the anomalous diffusion and pinch, with NCLASS providing the neo-classical diffusion and convective velocity for all ion species. Two theory motivated models for anomalous convective velocity are used in JETTO which associate pinch velocity with either relative magnetic shear or with temperature gradient. Three JET pulses from the trace tritium campaign were chosen with different densities and Zeff for the tritium transport modelling. The result of simulations will be compared with the measured neutron data.