I really don't take any notice of sell by dates, and only take notice of use by dates when you're talking about meat or fish. If they smell and look okay, then they are okay. As for vegetables, as long as they look and smell okay, use them, even if they are slightly wrinkly, they won't kill you and can quite easily be used in some way. There are now use by dates on cans for goodness sake! When they found Scott of the Antarctic's camp, there was canned food there that was still perfectly edible. What annoys me though is that when I was young, if bread went off, it went hard and could become a bread pudding. Now it just grows alarming green mould? What is that about?