Currently retailer Marks & Spencer has a 50% sale online, but for just one day on Friday 19 March buy the same goods via M&S* website and they will be reduced by a further 25%.
*Thanks to Martin @ Moneysavingexpert.com!*
If you want them delivered to home, this will entail you paying £3.50 p&p, though you can request to collect FOR FREE from your nearest store. If you do get it delivered, always factor in the £3.50 cost (if youre spending over £14 then the discount covers the delivery).