Still, there is that Pink Heaven… And such notes may prove too jarring for some. Of course, they are literally encoded in the music and its hit numbers. A character mocks heroine Sandy as Sandra Dee, despairing of her virginity. Sandy herself is “Just a fool who’s willing to sit around and wait for you. There’s nothing else for me to do.” Of course not. She’s hopelessly devoted to Danny (Dan Patridge). However, once she’s taken the Grease cure and she’s clad in skin-tight leathers she has the confidence to tell him, “You better shape up, ’cause I need a man, and my heart is set on you.”

But Sandy’s truly greased lightning costume change is just one of the wows of the evening. Another is Vince Fontaine (Peter Andre)’s deliberate failure to drop to a split. His many fans in the audience roar their delight. Most of these moments, and there are many, are to be found in the singing, dancing and staging rather than the Book. Even if a lot of the pelvis action does ignore the Principal (Camilla Powlesland)’s ban on tasteless or vulgar movements.

It is certainly a stunning experience to see this huge cast fill the stage of the Dominion and weave complex patterns around it with utter precision, as if a rolling sea came to life on a beach and showed you just how clever it can really be with the right minimal set. At least when it is choreographed by the peerless Arlene Phillips.

It would be unfair to single any one of this brilliant cast. Though Rizzo (Jocasta Armgill)’s  “There are worse things I can do,” is a still point of pathos and nuance before the accelerating rush towards the inevitable, “You’re the one that I want.” But that tremendous ensemble piece isn’t the end. Instead we have a reprise and medley to keep our toes tapping on the way home. By which time this terrific Cast and its brilliant live backing band have expended enough energy to power the National Grid for a month. Or two. Enjoy!