I have a supermarket delivery booked for tomorrow and have just gone online to add a couple of things. I scrolled through the items I ordered (on 26 Nov when this weekend's slots became available), only to discover that the free range chicken for Christmas lunch is no longer available. Several other chickens and turkeys had also sold out.
You may want to check your own deliveries.
I've complained saying that knowing since the end of November what people had ordered, they should have reserved sufficient to cover all the orders for the next three days.