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
MAMA & Company by LN-Gaity, a joint venture of Live Nation UK and the parent company of MCD Productions. According to the reports three MAMA venues, the Ritz in Manchester, the Forum in Kentish Town and the Institute in Birmingham, would be rebranded by Live Nation as the O2 Ritz Manchester, O2 Forum Kentish town and O2 Institute Birmingham. MAMA & Company MAMA & Company is a live music and lifestyle entertainment company which was founded in 2005 and owns and operates a number of live music venues and festivals in the United Kingdom. The company owns six London venues and three regional