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
Legal monopoly sometimes call the system a legal monopoly anyway. The creation of Sirius XM Radio by merger left the United States with only one licensed satellite radio broadcasting company. However, the United States Department of Justice decided that this was not harmful to competition, due to the presence of terrestrial broadcasters. Legal monopoly A legal monopoly, statutory monopoly, or "de jure" monopoly is a monopoly that is protected by law from competition. A statutory monopoly may take the form of a government monopoly where the state owns the particular means of production or government-granted monopoly where a private interest is protected