Phase plots and residuals for the maximum likelihood solution with N_p = 3 and a white noise model. Top panels: RVs folded at each of the three orbital periods, after removing the contribution from the other two Keplerians. Bottom panel: residuals after subtracting the combined signal of the three Keplerians, with an inset showing the ESPRESSO residuals. Data from HARPS and ESPRESSO are colour coded as in Fig. 1, but in the top panels the ESPRESSO points are highlighted. The residual (weighted) rms for the full data set is also shown.