I was looking for some Aveeno at Superdrug, as the 300ml daily moisturising lotion is on for 4 quid a bottle, and 3.60 after 10% NUS discount... but they were all out of stock, so I checked it out on amazon.

Same price (4 quid) as an add-on item (minimum 20 quid spend) and it has a 1 quid off voucher on the main page. So that's 3 quid for the first one, assuming you want 17 more worth of items. Also works on subscribe & save, making it 2.80. I think it's only for the first one in your basket, as it didn't work when I tried to add 5. Hopefully this works for everyone - I tried it from my phone and 2 PCs in incognito mode and worked on all

This deal is best for those who are going to buy something from amazon anyway, as you get free delivery for orders over 20 quid - and add on items also require 20 quid minimum spend (whether you have prime or not)

You might be able to combine with other Amazon offers on now, summarised here (and found on HUKD by others - thanks to the community!):
-there's a 10 quid off voucher for amazon students right now (I found it on HUKD) called APPRENTICE10
-5 quid back for 100 quid top up (some accounts - see main amazon page when logged in)
-7 quid back for buying 30 quid gift cards (some accounts- see main amazon page when logged in)
-5 quid referral bonus for referring others to amazon student (google referral page)
-5 quid off 20 voucher on amazon prime now first shop (although the 1 quid off voucher for aveeno isn't showing up on the app) with NOWFIVE
-20 quid off 60 voucher on amazon fresh first shop (5 quid for the aveeno there, though)
-unrelated but 10 off first order of 15 quid on amazon prime now restaurants (like deliveroo)

Hope it's of use to someone!