Can anyone advise me on the correct plaster to use on the interior face of an external facing wall? The wall is a cavity. Is Browning ok to use? Many thanks.

Why make life hard for yourself? Dot & dab 12.5mm boards onto wall & skim,or for extra insulation use 27mm Thermaline Plus. But if you're insistant on a wet job,i would use Hardwall..........Brownings' to soft. You may get some of the old boys on and say sand/cement render..........'proper plaster' ;) Carl.

Totally agree with Carl. And thats from one of the old boys;

Also agree with Carl