Sainsbury's Plum Chutney

Run lid under hot water then, if you wear rubber gloves, the lid should unscrew: no idea why wearing rubber gloves works, but it usually does.

Have you removed a see-through security strip?
My husband tried to open something the other day with that shrink-wrap thingy still on! 😂

You might need to do it a few times.

Try tapping the lid firmly with a wooden spoon.

Did you run the lid under hot water? That's what I do