galaxies at these redshifts observed by [@Cimatti_etal:2008] suggests that of the two classes, the sBzKs should suffer more from such incompleteness. There is no evidence from their number counts to suggest that they are adversely affected in this way, so we expect that the pBzKs are likewise unaffected below this magnitude.

Photometric errors are another source of concern. Adjusting the boundaries for pBzK selection by the mean photometric errors for sources close to the boundaries ($0.1$ magnitudes), we found that such errors had no noticeable impact on the decline in the pBzK population. Additionally, since the pBzK region of the colour-colour plane is sparsely populated, photometric errors are likely to scatter fainter objects [*into*]{} pBzK selection, rather than the opposite. The faint pBzK counts are thus likely to be slightly [*overestimated*]{} because of photometric errors.

We conclude that the flattening in the pBzK population is likely to be real and the subsequent turn-over is probable but not certain. We note that the turnover corresponds to absolute magnitude $ M_K = -23.6$ at z = 1.4, which is close to the value of $L^*$ determined for the K-band luminosity function at these redshifts [@Cirasuolo_etal:2007]. Taken at face value, these results are 