seagullsovergrimsby
#cpfctinpotclub
the whole thing is a mess. doesnt help with the different "use by", "sell by" and the very subjective "best before" dates. the former is simple enough and usually on meat and perishables. Sell by is there for stock control. best before is there for quality control. best thing is to judge for yourself. if a delivery of milk, bread or meat has been left outside for 6 hours of summer sun waiting to go into store, then the date becomes pretty meaningless.
my dad has a stock of old beer, 2006 is the date on them and when opened they have a tendancy to foam up straight away or else they taste very over-malty (some might like this and says its well conditioned). i've stopped drinking them now as i think its a tad OTT.
the one that makes me laugh most is water. it has nothing in it to go bad or even deterioate in quality, unless you leave the bottles outside in midday sun.
The reason there is a use by date on plastic bottled water is to cover the manufacturer's arse if any chemicals in the plastic leach into the water and contaminate it over a very long period of time.