Also any recommendations on which lath to use? Was thinking this: http://www.diy.com/departments/galvanised-steel-sheet-lath-l2500mm-w700mm/35772_BQ.prd
No idea where you are, but if you close to one their branches, it's cheaper. http://www.insulationplace.co.uk/Diamond-Lath-Galvanised-2500x700-263-DL089.html As to fixing, you could use metal hammer drive fixings, would need to drill pilot holes, or large head stainless steel screw, might be easier than mickey pins in hard brick. Also ideally need to use some integral spacers to lift the mesh clear of the surface, their brand name eludes me. Here a fixing guide http://www.plasterbeadssa.co.za/Broc/Riblath.pdf
Any idea whether an external no more nails could do a job at attaching lath? Something like this: http://www.toolbank.com/p/C11036/UNI/UNI1427383 Just exploring ideas.
Something like solvent gripfill might, never tried it. Could use a stainless steel screw to fix it, with a small washer or penny washer.