E-coupons new in the UK

Family coupon clippers may be interested in this news. The British just got coupons - digital ones, that is. Only they're not called coupons across the pond. These are called e-vouchers. The VoucherCodes site says users can "simply enter a code into the checkout of participating [online] stores to receive an instant discount." You probably already know of some US ones: e.g., RetailMeNot.com, UltimateCoupons.com, CoolSavings.com, FatWallet.com, etc., etc.