I just copied and pasted the terms and conditions:

Terms and Conditions: •This Promotion entitles you to £15 off a Kindle (a “Qualifying Item”) when using the promo code “KINDLE15” (“Promotional Code”) or £25 off a Kindle Paperwhite when using the promo code “KINDLE25” (“Promotional Code”). •This Promotion starts at 09:00 GMT on 16 March 2016 and ends at 23:59 GMT on 29 March 2016 ("Promotional Period"). •You may use the Promotional Code to purchase a Qualifying Item at the reduced price from Amazon.co.uk during the Promotional Period. •This Promotion is only open to customers who have never previously registered a Kindle eReader or Fire tablet device. Customers must have also made a paid purchase on Amazon.co.uk in the last 12 months. •This Promotion is only available to customers who have their registered address in one of the following territories: Great Britain, Jersey and Guernsey •This Promotion is limited to one Promotional Code per customer. •This Promotion may not be combined with other offers. The Promotional Code is non-transferable, non-exchangeable and is not for resale. •The Promotion does not apply to purchases from third party sellers at Amazon.co.uk’s Marketplace platform or any of Amazon.co.uk’s Trusted Partner sites, or from any other Amazon websites. Certified Refurbished Kindle devices do not qualify for this Promotion. •Cancellation of an order of a Qualifying Item means the Offer will cease to apply to that particular order. If a Qualifying Item is returned then Amazon will, subject to the returns policy, refund the discounted price rather than the usual price. •The Amazon.co.uk Conditions of Use & Sale and Promotional Code and Promotional Credit Terms & Conditions apply. •Normal Amazon.co.uk terms and conditions for using the Amazon.co.uk website apply. If you have any enquiries please contact us using our online e-mail form.