EDIT: Thank you to @1616french
for another code that might work if this one doesn't PEHAH - 12 months buy now pay later and £30 credit to your account.
I call that a deal! Buy something for 60 quid and you only pay 30.
New customers only and you need to open a credit account (read below for more info)
Wish I could game the system again as a new customer.....
Basically, you need to sign up for a credit account (credit check included) and you buy the total cost of your shop by "adding to your account" (I.e. you now owe very the money)
They then credit 30 quid to your account so you essentially pay £30 less back when you pay it off.
Just make sure you pay it back and don't incur interest.....they don't just give out 30 quid for nothing....
...they do it because they want people taking out credit accounts, borrowing money and incurring interest.