I've read the story - it's in the Daily Fail, so obviously is accurate, non-sensationalist, and all of the facts have been throughly checked by the investigative journalist - and I have a suspicion that there may be a no-win-no-fee lawsuit waiting in the wings.
I can't see how the mould she claims was in it could be missed - even by someone "distracted" by their baby - you know, the one they were shovelling food into. I also don't think that two different varieties could be affected, unless someone in the supermarket opened them, spat in them examined them, and then put the lids back. But the mother insists the lid popped as it should.
I don't believe her - I don't think she tested it. (If she's concentrating on her baby too much to check what she's feeding her, I can't see her checking the "pop" on lid.)