BIGTHANKS
Spend £50 or more in a single transaction (on a single item or on multiple items) dispatched from and sold by Amazon at www.amazon.co.uk and £10 will be deducted from your total order value when you enter promotional code BIGTHANKS at checkout. The Offer does not apply to digital products or products from third-party sellers on Amazon's Marketplace platform. Each customer may claim a maximum of one offer. This offer cannot be used in conjunction with any other promotional codes or on any pre-existing orders. This offer ends at 23:59 BST on Monday, August 3, 2015.
Here's a screenshot showing discount applied.