http://www.nectar.com/doublevalue/index.rnectar

Between 23 July and 12 August 2014 your points could be worth Double, Triple & More when exchanged for Double Up & More vouchers to spend on selected rewards. Where your points are usually worth £2.50 for every 500 points at Sainsbury's, they'll be worth at even more to spend with THORPE PARK Resort, SEA LIFE centres & Sanctuaries, PizzaExpress and many more.