REVIEW: York Stage in School Of Rock The Musical: The Next Generation, Grand Opera House, York, until Saturday ****

Finn East’s Dewey Finn: Reasserting his golden talent to amuse. All pictures: Felix Wahlberg

AS the new school year settles its feet under the table, School Of Rock opens for alternative lessons in life: music to the ears of anyone who believes that education should add up to more than Rishi Sunak’s vision of compulsory Maths to the age of 18.

After John Godber’s Teechers and Willy Russell’s Our Day Out both espoused the value of looking outside the box to stimulate children’s minds and actions, a more innocent force does so in School Of Rock in the idiot-savant form of Dewey Finn (Finn East).

Kicked out of his band, this failed rock-god guitarist is now in danger of being booted out of best mate Ned Schneebly’s (James Robert Ball) flat for pushing his freeloading beyond the tolerance of Ned’s insufferable, controlling partner Patty Di Marco (a suitably shrill and shrewish Amy Barrett).

Down but not yet out, he pretends to be teacher Ned to take up a substitute teacher’s post at posh and proper prep school Horace Green, immediately jettisoning Maths, tests and gold stars for lessons in the history of rock. Heavy rock, hard rock, not the swiftly dismissed Taylor Swift and Kanye.

Dewey is committing identity fraud, but he has a rebellious charm, the cheeky big kid within him encouraging his young charges to express themselves, all the more so in the hands of Finn East, who may have shades of Jack Black (from Richard Linklater’s 2003 film) in his performance but bags of personality of his own making, built on his instinctive comic timing and irrepressible stage presence.

He just happens to be a cracking rock singer too, and these are big, big rock songs, challenging to sing in the compositions of Andrew Lloyd Webber, especially When I Climb To The Top Of Mount Rock.

Crucial too, in the guise of Dewey, is his interaction, his easy connection with the multitude of children that makes up the Next Generation of the title: led by the supremely talented young band of Charlie Jewison’s knee-slide guitarist Zack Mooneyham, Daniel Tomlin’s geeky keyboard wizard Lawrence Turner, Zack Denison’s all-action drummer Freddie Hamilton and Matilda Park’s ace “bass face” Katie Travis (Park having mastered bass in a matter of weeks).

Plenty of children’s roles add to the joy in Julian “Downton Abbey”  Fellowes’ ebullient script (rooted in Mike White’s screenplay), from Theo Rae’s fashion-fixated Billy Sandford to Molly Thorne’s bossy Summer Hathaway and Eady Mensah’s shy Tomika, from Team Gibson (with performances being shared with Team Fender, the names referring to makes of guitar).

Adults tend to play second fiddle, except for Megan Waite’s operatic-voiced head teacher, Rosalie Mullins, so repressed and orderly until Dewey brings out the Stevie Nicks butterfly from her dowdy chrysalis, and Dewey’s flatmates, Barrett’s ever-exasperated Patty and Ball’s Ned, a bundle of nerdy nerves that craves release in reconnecting with his past. Look out too for late replacement Flo Poskitt’s comical cameos as Ms Sheinkopf and Mrs Sandford.

School Of Rock is described as “technically challenging”, partly on account of having two bands, not only the burgeoning young players but musical director Stephen Hackshaw’s band that plays in the theatre boxes, rather than the pit, at one point stepping forward to watch the young’uns in the climactic Battle of the Bands.

The first night is not without technical hitches in the sound balance, but these are ironed out quickly, and in every way this is a show with high production values, from Nik Briggs’s direction, bringing out such confident, expressive, energetic performances in his next generation, to Danielle Mullan-Hill in her rock choreography, peaking with Stick It To The Man.

Lighting designer Adam Moore and sound designer Ian Thomson evoke the atmosphere of a rock gig, the lighting rig absolutely looking the part, topped off by fireworks fizzing at the finale. Briggs’s set and costume design rock, and Phoebe Kilvington’s hair and make-up is the icing on the cake.

The accents are uniformly spot on too in this all-American celebration of music, friendship and the power of self-expression, where the young cast all deserves gold stars and Finn East reasserts his golden talent to amuse.

York Stage presents School Of Rock The Musical: The Next Generation, Grand Opera House, York, until Saturday, 7.30pm plus  2.30pm Saturday matinee. Box office: atgtickets.com/york.