Instructions:Apologies if this is the wrong category but just logged into the Amazon App and scrolled down the main page and found a *thank you for signing in* link!
Redeemed to get £5 off promo code added to my basket!
Thanks to Toonah it's £25 minimum spend and the T&Cs are here also from Toonah!
Hopefully useful to some or all!!
After speaking with Amazon they confirmed this is for customers who have signed into the App for the first time. Whether that in the actual case I don't know but I thought this may be usual to know.