This method is for screeding floor and laying same day...not if floor is already screeded.
The way it was done was to screed an area of floor and the same day lay tiles by applying a slurry (neat cement and water) over the still damp screed and then tapping tiles into the compound. Worked great with the old quarry tiles.
Yeah,i have just used that old method at my caravan,screeded a patio 34ft long by 14ft wide,laid my ( i know,not tiles lol ) york stone onto a slurry,left 2 hrs then grouted,it looks the dogs danglies,infact it looks that good other residents on the site have asked me for a quote,SORRY was my reply,i only done it for us,to much work involved for other people,patio base was 8" screed,because of the fall of the land.