Tracked by Evreward since 2016, Wish.co.uk offers coupons, cash back rebates and rewards, with savings as high as 80% off. Wish.co.uk discount coupons are somehwat rare, available a few times each year. Even when Wish.co.uk doesn't have a coupon, you can always get up to 20% cash back, and other great rewards, with every purchase.