Recovered pseudo-|$C_\ell$|B-mode power spectra for simulations containing both white noise and common-mode |$1/f$| noise. The upper panel shows the recovered spectra, the central panel shows the ratio of the recovered spectra to that recovered from the simple simulations and the lower panel shows the standard error compared to the predicted B-mode-only signal. See the caption of Fig. 2 for further details of the curves plotted.