Constraints in the (Δ, w₀), (H₀, Δ) and (H₀, w₀) planes (top, middle and bottom panels, respectively) for Model L, with the Hubble constant being a free parameter and the third parameter marginalised. In all cases the black contours denote the one, two and three-sigma confidence levels, while the colourmap depicts the reduced chi-square of the fit for each set of model parameters (a dark red colour corresponds to a reduced chi-square of three or larger).