The Astronomical Thermal Emission Camera (AzTEC) 1.1mm survey of the two SCUBA HAlf Degree Extragalactic Survey (SHADES) fields is the largest (0.7deg^2^) blank-field millimetre-wavelength (mm-wavelength) survey undertaken to date at a resolution of 18arcsec and a depth of 1mJy. We have used the deep optical to radio multiwavelength data in the SHADES Lockman Hole East and SXDF/UDS fields to obtain galaxy identifications for 64 per cent (80 per cent including tentative identifications) of the 148 AzTEC-SHADES 1.1mm sources reported by Austermann et al., exploiting deep radio and 24um data complemented by methods based on 8um flux density and red optical-infrared (i-K) colour.

Cone search capability for table J/MNRAS/426/1845/tableb1 (Reliable and tentative radio, 24um, 8.0um and i-K identifications in the Lockman Hole field)

Cone search capability for table J/MNRAS/426/1845/tableb2 (Reliable and tentative radio, 24um, 8.0um and i-K identifications in the UDS field)

Cone search capability for table J/MNRAS/426/1845/tableb3 (Radio and 24um identifications in the Lockman Hole field)

Cone search capability for table J/MNRAS/426/1845/tableb4 (All radio and 24um identifications in the UDS field)