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
Hayward Medical Communications Hayward Medical Communications Hayward Medical Communications is a division of Hayward Group Limited. It is a UK-based medical communications agency and publisher, with offices in London and Newmarket. Founded in 1991, Hayward Medical Communications has a portfolio of journals targeted at healthcare professionals and patients. The company also publishes multimedia products and services for the pharmaceutical industry, as well as for government agencies, charities and non-governmental organisations. Its services include consultancy, programme planning, professional training and health technology assessment submissions to the NHS agencies: the National Institute for Health and Clinical Excellence, the Scottish Medicines Consortium, and the All Wales