Evolution of planetary systems with different pebble fluxes (S_peb = 1.0, 2.5, 5.0 and 10.0, top to bottom panels) and α_mig = 0.00054 in time. Semi-major axis (left panels) and planetary mass (right panels) of 60 planetary embryos as function of time. The gas disc lifetime is 3 Myr after injection of the planetary embryos. The black, grey and coloured lines show the same behaviour as bodies in Fig. 3.