This afternoon on the last thread, @SadlyACupOfTeaDoesNotSolveEverything kindly gave me a student discount code for Dunelm.
I thought I'd used it (and posted a message to say thank you and that I'd used it) but tonight realised that I hadn't pressed "submit" on the final order confirmation page so the order never actually went through. When I've tried to order the items this evening, it says the code is no longer valid, so unfortunately it seems that somebody else has used it.
For those of us who share on-time use codes, it might be worth us PMing the codes to each other instead of posting them on the thread, so the same thing doesn't happen to somebody else.