The urban music of Dizzee Rascal seemed to suit the network of dank, shadowy railway arches where he performed last night.

The venue under London Bridge was an atmospheric backdrop for the 22-year-old rapper from Bow, who was there for a free music event staged by a mobile phone company.

For the few hundred fans who got in after emailing their mobile numbers, it was a memorable experience thanks to resident theatre company Shunt.

There was a carnival theme with stilt walkers and conjurors, while a lift that rattled and shook during its apparent descent was a fake. We hadn't actually gone anywhere: it was all a trick pulled by the suspiciously manic lift attendant.

Amid this artifice, the Rascal put on a show largely unadorned by gimmicks - he performed with just a fellow

MC and DJ - and underlined his talent as a vocalist and urban music producer.

Three years after he won the Mercury Music Prize, Dylan Mills has stayed ahead of the pack of UK rappers by concentrating on his career rather than controversy.

He opened with Jus' A Rascal, a familiar tune with rapidfire vocals that got the crowd moving, but it was the DJ who really ignited the show with some choice selections during Everywhere.

While Mills spat out his lyrics, Queen's Another One Bites The Dust was played over the track followed by Gnarls Barkley's Crazy, with the young audience clearly more familiar with the latter. After touring with the Red

Hot Chili Peppers in Europe, this was a chance to try out new material on home turf. Flex was a catchy tune in celebration of " the ladies", as he referred to them, and a couple of girls in pink underwear and blonde wigs gyrated on stage.

Sirens was huge and noisy, but the one surely destined to be the comeback single was Da Feeling, an exhilarating combination of drum'n' bass and Jamaican dancehall which featured Joss Stone - on tape this time.

Occasionally, Dizzee misfired, as on the dreary marijuana anthem Lemon, and his relentless style could sometimes be demanding.

But the stunning synthesis of beats and bleeps on Stand Up Tall was a fantastic-finale and, perhaps mindful of his fee, he then urged us to "make some noise for T-Mobile".

Dizzee earned his cheque - but I couldn't quite bring myself to cheer for a mobile phone network.