Instructions:Just lost a massive post detailing all the following codes, I don't have time to write it all again, but try all of the following if you're ordering groceries - the majority worked for me and I didn't buy the item specified in many cases.
PLEASE DON'T EXPIRE JUST BECAUSE THEY DON'T WORK FOR YOU! THERE ARE DIFFERENT EXPIRY DATES ON DIFFERENT CODES FROM 14/12/08 TO 28/12/08, AND THEY ALL MIGHT NOT WORK FOR EVERYONE, BUT SOME MIGHT FOR SOME PEOPLE!
XXDEAL - £5 off £50 spend (if it doesn't work, try XXBONB - thanks Scarfie!), used along with the following:
XXGV4R, XXJ3DF, XX9RH7 - 15p
XX7JDQ, XXBHK2, XXM4TP, XXPTET, XXMUSH - 20p
XXMNT4, XXY2QW, XX3NYK, XXPMQH - 50p (all accepted but not all discounted)
XX97BP - 30 points free
The following didn't work for me but might be worth a try for other people:
XXVEGT, XXCRAN, XXFRUT, XXTURK - 20p
XXKLVR - 45 points with Quorn purchase