O2 (UK) Telefónica O2 had a long-standing relationship with Arsenal F.C., being their shirt sponsor until the end of the 2005/2006 season. In 2005, a three-year deal was signed that saw Telefónica O2 become the team's exclusive mobile communications partner. O2 were the main sponsor of the Channel 4 reality TV show "Big Brother" from its second series (as BT Cellnet) in 2001 until its fourth series in 2003. They also sponsored the spin-off shows "Celebrity Big Brother 2" in 2002 and "" in 2003. In total O2 sponsored five series of the show. O2 sponsored music festivals, the Wireless Festivals, from
O2 Academy Bristol O2 Academy Bristol The O2 Academy Bristol (formerly known as the Locarno) is a music venue located below the now demolished ice ring on Frogmore Street, Bristol, England. It is run by the Academy Music Group. On 1 January 2009 sponsorship was taken over from Carling by telecommunications company O2 and the venue's name changed from the Carling Academy to the O2 Academy. The Academy which hosts club nights (capacity 2,500) and gigs (capacity 2,000) was opened in 2001, and was the third Academy venue in the UK. The venue was originally part of Mecca Leisure Group's New Entertainments Centre