The usual from Amazon: buy a gift card and within 48 hours they will add a £6.00 promo credit to your account.
Buy £40 of Amazon.co.uk Gift Cards and get a £6 promo code for your next order
To enjoy this special offer:
1. You must be the recipient of the corresponding offer (on Amazon.co.uk or via e-mail from Amazon.co.uk),
2. Click the button 'Click to qualify for the promo code' below to see if you're eligible for the offer,
3. Purchase £40 or more of Amazon.co.uk Gift Cards in a single order on Amazon.co.uk between 9 December, 2016 and 18 December, 2016.
We'll automatically apply the £6 promotional code to your account and confirm by e-mail within 48 hours after your gift card order has been dispatched.
The £6 promotional code can be spent on products sold by Amazon on Amazon.co.uk until 6 February, 2017. See Terms and Conditions of the Promotion below for more details.
Deal URL: https://www.amazon.co.uk/b?ie=UTF8&node=11301518031
(thanks to exexpat14)