I have worked for many of the major builders over the years,ran my own business and ran jobs for contractors and developers.
I have nvq 2 in plastering,drylining and tiling and am currently studying for my nvq assesors award.
I usually hit 60 to 80 m2 a day of skimming,2 coat work.Float and skim,render(sand and cement and krend ect),venetian plaster,coving are all within my skill set.