I don't know if this has been mentioned before so apologies if it has, but I couldn't find it anywhere.
I realise many forum members qualify for the B&Q Diamond card membership, but I stumbled across their membership scheme for other age-groups recently and saved 15% off their sale last weekend.
I found out information from their website. They send through offers via email and have special discounted weekends (such as last weekend).
No card issued - you can just print off your code and barcode to use in store.
It's a bit tricky to find, so I am posting the link below:
http://www.diy.com/diy/jsp/content/marketing/bandqclub/index.jsp?icamp=YCDI_Club