Just been to the Basildon Tesco store and saw the packs of 4 for £3.99 and packs of 8 for £5.00! £6.00 off the normal price!!
No idea if this is store specific, the receipt just shows the price as being £5.00 not showing any saving. (Yellow shelf ticket with £5.00 in bold characters and £6.00 off in small if that helps)