Millennium Dome the dome's new owners, the Anschutz Entertainment Group, to a design by HOK SVE and Buro Happold. It cost £600 million, and the resulting venue opened to the public on 24 June 2007, with a concert by rock band Bon Jovi. During the 2012 Summer Olympics, the artistic gymnastics events, along with the medal rounds of basketball, were held at The O2. It also held wheelchair basketball events during the 2012 Summer Paralympics. For sponsorship reasons, during those times the arena was temporarily renamed the North Greenwich Arena. Issues related to the Dome damaged Peter Mandelson's and John Prescott's political
O2 (UK) BT subsidiaries: Esat Digifone in Ireland, Viag Interkom in Germany and Telfort Mobiel in the Netherlands. The rebranding was supported by a European advertising campaign, which began on 16 April 2002, across all four countries, at a cost of £130 million. The main launch campaign ran from 18 June and was developed by Vallance Carruthers Coleman Priest, working alongside brand consultancy Lambie-Nairn, creators of the "O2" brand identity. In March 2005, mmO2 restructured its shares and the company was relisted as O2 plc. On 30 November 2005, O2 agreed to a takeover by Telefónica, a Spanish telecommunications company, for £17.7