In-store discount codes for big shop?

[ShotsFired]

I know lots of supermarkets do big discounts like "£20 off £80 first online shop" but for various reasons I want to go in-store, sometime in the next 7 days. Do any supermarkets offer discounts like that too?

I can get to Tesco, Morrisons, Waitrose, Asda, M&S, Sainsburys...

(Some of the things I won't be able to get at Aldi/Lidl and would prefer one trip rather than two if poss.)

....Hmmm. In hindsight, I realise that I may have asked a very stupid question, because if they did, plenty of people would be doing that every single week

Maybe it's more likely to have smaller vouchers that i could use if I broke up the shop into multiple transactions? (e.g. Waitrose recently sent me some £4 off £20 shops, but they've expired now)