Telefónica UK Limited is a leading communications company for consumers and businesses in the UK, with 22.3 million mobile customers and over 700,000 fixed broadband customers as at 31 March 2011. Telefónica UK Limited is part of Telefónica Europe plc which is a business division of Telefónica S.A. and which uses O2 as its commercial brand in the UK, Ireland, Slovakia, Germany and the Czech Republic, and has 56.9 million customers across these markets.