Well, not so much a receipt but a previous order?
Trying to be a smart arse and want to book my shopping for 11th Dec - my next shopping. But I have no clue what I want for my next shop.
I have been smart.. or i thought i was and loaded some nappies, eggs and rice into my basket so i had a slot booked for today (booked a week or so ago). Only, i forgot to cancel it, so not only do i have the 75 shop arriving that I want this evening but 4 packs of 72 nappies which I have no need for 
I am a doofus.
So... how do i put a previous shop into my trolley now... for example, the £75 one that is currently being picked for me for delivery tonight?