i remember having to strip down ballvalves, stop taps, sink taps atc down to their component parts, then getting a lecturer to come and see then we had to put them back together and show them working correctly before the would sign it off. and that went for everything we did,, making hanging brackets, cylinder cupbaords, bathrooms. and as for sheetwork, lead bashing, welding, Nuralite dog ears, zinc and copper sheetwork, brazing 4"copper pipes vertically, welding and cutting steel pipes. God we had it hard!!!!!!!!!
but im more of a TRAINED plumber than any NVQ plumber will ever be