O2 (UK) they can do it too" in reference to Vodafone and EE, O2's biggest competitors and the UK's top three mobile-telecoms companies. O2 (UK) Telefónica UK Limited (trading as O2 – stylised as O) is a telecommunications services provider in the United Kingdom, owned by the Spanish multinational Telefónica, and is headquartered in Slough. With 25 million subscribers (as of December 2017), O2 is the second-largest mobile network operator in the United Kingdom after EE, with Vodafone in third place. O2 was formed in 1985 as Cellnet, a 60:40 joint venture between BT Group and Securicor. In 1999, BT Group acquired
O2 Academy Bristol that holds a Ramshackle club night. 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