Physical conditions including metal free-free emission in the best-fit MHD model. α is the viscosity parameter, T_c is the mid-plane temperature calculated according to Eq. (14), Σ(R) is the surface density, EM is the emission measure, f is the ionisation fraction in the midplane, and H_hwhm is the height at which the density of free electrons is half the density of free electrons in the mid-plane (half-width at halfmaximum). The vertical dashed red line is the truncation radius, R_t = 1.69R_Jup, and the disc total mass is 1.93M_Jup.