Same thing happened to me - I went down to morrisons yesterday afternoon to buy some bits and it was PACKED with people! There was literally was no space to move, and people were barging pass other people and waking really fast and grabbing things off the shelves.
The car pack was also chaos as people were trying to park and trying to steal other peoples spaces
It was like the end of the world!
Those self-serve check-out things dont help. Bloomin' machines replacing humans - they are no quicker and always complain "unidentified baggage, the item isnt in the bag, assistant needs to verify your age" etc etc...meh waste of time they are
