save money while shopping in uk

Here a a list of some good website help you save money while shopping in UK

Quidco, http://www.quidco.com/ - a cash back website
Topcashback, http://www.topcashback.co.uk/, - a cash back website
HotDealBox, http://www.hotdealbox.co.uk/, - a discount deals and vouchers website

Hotukdeals, http://www.hotukdeals.com/, - a discount deals website

If you have some suggestion of other website, please let me know.