I spoke to Tiff about these courses before- being as he is sort of a trade chappy.. I also have a mate who is a plasterer.
They said...
WASTE OF MONEY.
The only one worth doing was Tiling apparently as its relativly easy to pick up.
They both reckoned learning plastering within 1 week was a joke... in fact dolly Daz's mate Gaz employees a lad purely to mix his plaster to his exact requirements- which I understand in its self is art.
Jake