This is it. The very last, the final, the ultimate instalment of a saga which, when you take the books and films into account, has been unfolding for nearly fifteen years. For some of you, there is no memory of a world without Harry Potter. And when the final film is screened, a few of us will look around and wonder where we are, and what we are going to do in this strange, new, slightly lonely world.

Perhaps we’ll go out and buy the Harry Potter cupcake mix, with extra bonus sparkly sugar stars – it really exists – and bake our misery away. Or perhaps we’ll simply just watch this film again.

If you’ve at least taken the trouble to see the previous film (Harry Potter and the Deathly Hallows: Part 1) you’ll have found out what the titular Deathly Hallows are, and that Voldemort has just got his hands on one of them. As this film opens, our heroic trio are still on the run, still tracking down and attempting to destroy fragments of Voldemort’s soul, and still struggling to grow into adults at the same time. If you really are new to all this and haven’t the faintest clue as to what’s going on, you’re still in a position to enjoy some of the most spectacular set-pieces in the series, leading up to a climactic final battle between, in ring one, Harry and Voldemort, and, in ring two, everyone else.

And then it will end. Perhaps we should start a support group.