This discount code ends today so if you want to grab a Wii U Pro Controller for £30.94 it works like this:
1) Add the Wii U Pro Controller to your basket.
2) Add this game http://www.rakuten.co.uk/shop/gameseek/product/NintendoWii5vk03ku93
(or any of a similar value as long as it reaches £40)
3) Type "GIFT40" on the Voucher box below Shipping and then the price will be £30.94.