How it started
Origins
The company's origins lie in both Telewest and NTL, which merged in March 2006.
Telewest began in 1984 in Croydon under the name "Croydon Cable", and was acquired by United Cable of Denver in 1988. The company expanded during the 1990s and adopted the Telewest name in 1992 following the merger of its then-parent TCI and US West. It expanded into cable television access in 1999 by purchasing the remaining 50% stake in Cable London, one of the first cable TV companies in the UK, from NTL, adding 400,000 homes in north London. In April 2000 Telewest merged with Flextech, and in November extended its cable network with the acquisition of Eurobell, taking the total number of homes past 4.9 million.
NTL was established by Barclay Knapp and George Blumenthal in 1993 as "International CableTel", taking advantage of the deregulation of the UK cable market. Initially, Cabletel acquired local cable franchises covering Guildford, Northern Ireland and parts of Central Scotland and South Wales. In 1996, CableTel acquired National Transcommunications Limited (NTL), the privatised UK Independent Broadcasting Authority transmission network. In 1998 CableTel adopted "NTL" as its new name.
NTL purchased the ISP Virgin.net in 2004, having originally operated it as a joint venture with Virgin Group since it launched in November 1996. It sold ADSL broadband services through BT landlines to those living outside areas served by NTL's cable network and also offered subscription-based and subscription-free dial-up Internet access. Prior to acquiring Virgin.net, NTL offered a similar package called NTL Freedom.
Merger and Virgin Mobile acquisition
From Wikipedia’s article on Virgin Media, shared under CC BY-SA 4.0.2