(AB) using the IRAC camera at 3.6$\mu$m and 4.5$\mu$m respectively. The resulting area with full multiwavelength coverage, following the masking of bright stars and artefacts, is 0.62 square degrees. Further details on the construction of the multiwavelength DR8 catalogue can be found in Hartley et al. (2013).

We determined photometric redshifts using the techniques outlined in Simpson et al. (2013). The 11-band photometric data were fit using a grid of galaxy templates, assembled using simple stellar populations from Bruzual & Charlot (2003; hereafter BC03), with a logarithmic spacing of ages between 30 Myr and 10 Gyr, and the addition of younger templates with dust-reddened spectral energy distributions (SEDs). The additional templates consist of a mildly reddened ($A_V=0.25$ mag) version of the two youngest templates, plus a version of the 30 Myr template with heavier reddening ($A_V=1.0$ mag). The resulting photometric redshifts show a normalized median absolute deviation $\sigma_{{\rm NMAD}} = 0.027$. The stellar masses used in this work differ slightly from those presented in Simpson et al. (2013), and instead are based on supercolour templates (see Section \[sec:masses\]). As noted in Section \[sec:uncertainties\], we investigated a range of alternative stellar masses, including those from Simpson et al. (2013), and found 