ITV is a British free-to-air television channel. Previously a network of separate uniquely identifiable regional television channels, ITV currently operates in England, Wales, Scotland, the Isle of Man, and the Channel Islands. From 2001 until 2013, the primary ITV channel was called ITV1. Wikipedia

ITV2 is a British free-to-air television channel owned by ITV Digital Channels, a division of ITV plc. It was launched on 7 December 1998. Wikipedia
ITV3 is a British free-to-air television channel owned by ITV Digital Channels, a division of ITV plc. The channel was launched on 1 November 2004, replacing Granada Plus.
ITV4 is a British free-to-air television station which was launched on 1 November 2005. It is owned by ITV Digital Channels, a division of ITV plc, and is part of the ITV network.

ITVBe targets the young female audience, airing reality and unscripted shows, including US imports such as The Real Housewives series, Million Dollar Listing New York and Botched; and original programming such as Dinner Date and most notably The Only Way Is Essex.
4seven is a British free-to-air television channel which was launched on 4 July 2012 at 7.00 pm. According to Channel 4, it was created in response to its viewers demanding Channel 4 to broadcast old programming from the network. 4seven launched with 20 hours of content in the schedule per day.
5Star (stylized as 5STAR) is a British free-to-air television channel owned by Viacom. It is a sister channel of Channel 5, 5Spike, 5USA and 5Select. It originally launched as the female-oriented Five Life on 15 October 2006, and was rebranded as Fiver on 28 April 2008 with a revised version of the same concept.

Dave is a British free-to-air television channel owned by UKTV, which is available in the United Kingdom and Ireland. The channel took the name Dave in October 2007, but it had been on air under various identities and formats since October 1998. Wikipedia