Oooh, this makes me so cross. Just fished out some supermarket (good brand) mince from the fridge, use by date today (date of manufacture 30/09).
It's a little grey and quite strong smelling, without smelling bad (I had to have a good sniff, rather than bowled over by the smell when I opened the packaging. It's smelling quite strong on cooking too.
I'm inclined to think it's ripe rather than gone.
It seems that everything I buy nowadays never lasts until the use by date. I suppose food is naturally supposed to go off and unnatural methods are often used to keep it fresh - but still, it seems to happen all the time.
Just wondered if you thought it was ok to eat? It's stewing away in tomato sauce with LOTS of garlic.