If you have an Amex rewards card, you can link it to your amazon account and claim a once off discount of £15 pounds
To receive your promotional discount, you must:
1. Add £25 or more of eligible items sold and shipped by Amazon.co.uk to your shopping cart.
2. Enter the promo code AMEX16SWP in the box provided on the checkout page and pay for at least a portion of your order with Membership Rewards points.
3. £15 of savings will be reflected on the final order checkout page.
Redeeming 200 points for 90p is the minimum
(This isn't a particularly good exchange rate so unless you've got lots of points and nothing else to spend them on you're best to claim just the 90p)
See the ts&cs for exclusions eg digital but worth doing especially today perhaps for a further £15 discount or if you missed out on a deal
Vaild until 31/10/2017 or first 33,333 customers