95% and 99% confidence level constraints on the contrast at the centre, Δ_C, and the redshift of the boundary, z_B, for the ΛLTB mock catalogues of Table 1 as compared to the constraints from the Copernican prior convolved with the CMB likelihood. The black star is placed at the fiducial values for the LTB parameters, i.e. Δ_C = −0.5 and z_B = 0.05 (top row, ΛLTB 1), Δ_C = −0.1 and z_B = 0.4 (middle row, ΛLTB 2), and Δ_C = −0.1 and z_B = 0.8 (bottom row, ΛLTB 3). We note that the z_B axis is not same for all figures.