E4.

E4 is a television channel which has been launched as a compatriot to channel 4 and was formed on 18th January 2001. It mainly consists of american tv programmes, such as the popular television series 'Friends'. It also broadcasts other american programmes like smallville, glee and ugly betty. It has recently began playing popular british shows such as The Inbetweeners which is responsible for E4's most successful broadcast to date which was on 11 October 2010 when an episode of the show pulled in over 3.7 million viewers. The "E" stands for entertainment, and the channel is mainly aimed at the lucrative 15–35 age group. The three most popular shows being aired on the channel are The Inbetweeners, Glee and Friends.

E4 has also been widely known for its promotional campaigns and the very popular 'Estings' before programmes, which are also well known to be on channel 4 as well.

On 16 December 2004, Channel 4 announced that the subscription channel would return to digital terrestrial television. From its launch until the closure of ITV Digital it was available as a bonus subscription channel. It became part of the Top Up TV subscription scheme until 27 May 2005, when the channel became available on Freeview, with the potential to increase advertising revenue by attracting a larger audience.