Instructions:Admittedly not as good as the last offer of £5 off £10, but nevertheless another giveaway... that is if you trust Amazon after their recent fiasco (it happens to the best ;-))
Exclusive £5 discount off selected products when you use your eligible MasterCard® credit card for a limited time. 1. Add eligible item(s) to your Shopping Cart for an amount over £40. 2. Important: Select your MasterCard credit card or add a MasterCard credit card as your method of payment. 3. Enter promotional code “PRICELES5” in the “Enter a gift card, gift certificate or promotional code” box on the select a payment method page. 4. Complete your eligible purchase. The £ 5 discount will be reflected in the Order Summary. For full terms see: https://www.amazon.co.uk/gp/feature.html?docId=1000842673
*** Types of Amazon CODE and USAGE ***
A bit like Tesco codes (eg starting TDX or X cannot be used with any other eCoupon code), Amazon "promotional" codes cannot be stacked to get greater discounts. Therefore something like the one-off 20% fashion promotional code (when you subscribe to Amazon fashion emails for the first time, btw don't bother trying to unsubscribe and then re-subscribe!) cannot be used with the MasterCard £5 off £40 promotional code. In the context of using it with any and especially the recent discounted Amazon gift vouchers (via an invitation only email), these (including the current Bespoke Deals £5 for £10 Amazon gift cards) can be used together. Finally, Lightning Deals are deemed promotional discount/ codes and once again cannot be used with other promotional codes ... but paid with any Amazon gift card (discounted or not)
*** Update 14 Jan 2015: deal still working because... ***
... whilst the actual offer expired on 31 Dec 2014, for those who might have clicked on the link last year and not used it, the code remains active "silently" (a bit like Tesco) in your basket until (if I remember correctly) 15 January 2015 when the code will then drop off (or may be it won't as some HUKDers are only using for the first time today!)... so use it or weep!