While everyone has been facing the wrong way, searching for rock's holy grail in the contrived profundities of Razorlight, or the tortured junkie poetics of Babyshambles, Britain's leading boy band has snuck up and become the nation's greatest rock act.

McFly have got the lot: the hurtling around, the sweat, the bloody-minded determination - and the musical ability. At the opening night of their first arena tour, not only do they prove themselves skilled on guitars, drums and vocals, but She Falls Asleep (part 2) sees Tom Fletcher rise out of the stage for a grand piano solo. (Close scrutiny of his hands on the video close-up reveals that, yes, he really is playing it.)

Their songs contain the traditional rock epiphanies but none of the boring solos - these are accelerated epics; guitar anthems for the ADD generation. "I don't want to see lighters," says Fletcher, "I want to see your mobile phones in the air! We're taking the concert into the 21st century!" As the audience of screaming 14-year-old girls and their mothers will testify, McFly really are down with the kids - with a combined age of well below a century between the four of them, they are the kids.

But most of all, McFly are the underdogs. They aren't the best-looking boys in school, they're the other ones, the inbetweeners who learned to get the girls by being funny. The show features fireworks, an orchestra, a rotating tower and a giant pair of inflatable pink legs. Oh, and lots of jokes about poo, including a cover of everyone's favourite school bogs anthem, Diarrhoea. They also cover the Who's Pinball Wizard, getting children and parents to wave their McFly scarves and sing along. What could be more rock 'n' roll than that?

· Until Sunday. Box office: 0870 909 4133. Then touring.