Osculating eccentricities (top plots) and inclinations (bottom plots) of the trans-Neptunian region after 4.5 Gyr of evolution inthe case where Neptune starts from 38 au and migrates inwards to 21 au. All four giant planets undergo inward migration in the disc plus outward migration to their current orbits. In the left plots, only true resonant particles in the 3:2, 5:3, 7:4, 2:1, and 5:2 MMRs are displayed. Other resonances have not been checked. We notice that the 5:2 resonance is populated in this case, even if not as much as the other main MMRs. The plots also show inclination–colour and eccentricity–colour correlations for the particles.