The O2 venue, rebranded The O2, was reopened to the public on 24 June 2007 with a concert by Bon Jovi in the arena. The O2 celebrated its first year with a book, including a double page picture of Elton John from his September 2007 "Red Piano" show. Prior to this reopening, other events took place, including a soft opening for residents of the area to explore the entertainment district and an opening for staff called "The O2 Premiere" which featured Peter Kay, Tom Jones, Kaiser Chiefs and Basement Jaxx. An event called "Out of the Blue" featuring circus acts also took
The O2 Arena interior of the dome had been largely cleared and before building work inside began, in December 2004, the dome was used as the main venue for the annual Crisis Open Christmas organised by the London based homelessness charity Crisis. Owing to the impossibility of using cranes inside the dome structure, the arena's roof was constructed on the ground within the dome and then lifted; the arena building's structure was then built around the roof. The arena building, which houses the arena and the arena concourse, is independent from all other buildings in the O2 and houses all the arena's facilities.