I originally learnt on a 4 week course with another company. Not everything can be learnt on these courses, you get taught the important basics, the foundations to, hopefully, a tiling career. Some centres also have extra specialist courses, such as Geometric Victorian tiling and mosaics etc., so as new tiles/tools develop then new specialist courses could be added or the tilers can go and do extra courses with the manufactures (eg. Porcel-thin etc.). When you retrain later in life you dont have the luxury of time you need to get out working, so you get the basics and then do extra courses as and when and and in what youre interested in (for me its mosaics). Ive never fixed anything over 600mm, dont even work with that size now, and Ive done alright. Believe me size isnt everything.
In the end its down to the tiler and what they do with the information theyve been given however theyve learnt it.
I dont know if UKTT do the same but the centre where I learnt also provided Resettlement Training for ex Forces guys, which was invaluable to these guys to get back into 'Civvie Street'.