Can you evidence this?
Was in today and everything has pretty much been moved around. What is entertaining to see was that all the "convenience" meals (don't buy these) have been moved to smaller fridge units on the far right of the store, perhaps they want customers to explore the Home section and make more use of Argos in store. Service there today was quick however the item was just pushed onto the counter and the staff member walked off without acknowledging the receipt or stamping it.
In terms of self scan, it seems this is the way forward with the big four supermarkets plus Lidl, haven't been to an Aldi store for yonks so can't comment. Maybe it's cheaper for them, but what it is, is far less customer centred.