‘Like swapping a Bentley for a Ferrari’: can the Harry Potter stage show survive being chopped in half?

<p>After a phenomenal decade-long run, the Cursed Child two-parter is being pruned. Will it still work? Our writer swishes her cloak, levitates her luggage – and hops aboard the streamlined Hogwarts Express</p><p>‘Silencio!” Two dozen tank-topped and T-shirted figures fall quiet, a