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We report the discovery of 59 globular clusters (GCs) and two candidate GCsin a search of the halo of M31, primarily via visual inspection of CHFT/MegaCamimagery from the Pan-Andromeda Archaeological Survey (PAndAS). The superiorquality of these data also allow us to check the classification of remoteobjects in the Revised Bologna Catalogue (RBC), plus a subset of GC candidatesdrawn from SDSS imaging. We identify three additional new GCs from the RBC, andconfirm the GC nature of 11 SDSS objects (8 of which appear independently inour remote halo catalogue); the remaining 188 candidates across both lists areeither foreground stars or background galaxies. Our new catalogue representsthe first uniform census of GCs across the M31 halo - we find clusters to thelimit of the PAndAS survey area at projected radii of up to R_proj ~ 150 kpc.Tests using artificial clusters reveal that detection incompleteness cuts in atluminosities below M_V = -6.0; our 50% completeness limit is M_V ~ -4.1. Weconstruct a uniform set of PAndAS photometric measurements for all known GCsoutside R_proj = 25$ kpc, and any new GCs within this radius. With these datawe update results from Huxor et al. (2011), investigating the luminosityfunction (LF), colours and effective radii of M31 GCs with a particular focuson the remote halo. We find that the GCLF is clearly bimodal in the outer halo(R_proj > 30 kpc), with the secondary peak at M_V ~ -5.5. We argue that the GCsin this peak have most likely been accreted along with their host dwarfgalaxies. Notwithstanding, we also find, as in previous surveys, a substantialnumber of GCs with above-average luminosity in the outer M31 halo - apopulation with no clear counterpart in the Milky Way.

The outer halo globular cluster system of M31 - I. The final PAndAS catalogue