3 January - The BBC cancels the appearance of Coca Cola sponsorship credits in the music charts in its BBC OneTop of the Pops show, after criticism from politicians and health campaigners that it would be promoting junk food and unhealthy drink products to teenagers.
4 January – ITV introduces a sixth weekly episode of Emmerdale airing on Sunday evenings at 7:00pm. The episode is dropped in 2008 to allow for one hour episodes on Tuesdays.
28 January – The Hutton Inquiry into the circumstances of the death of Dr. David Kelly is published. This is taken by most of the press to strongly condemn the BBC's handling of the David Kelly affair and to exonerate the government. The BBC's Director-General, Greg Dyke, chairman of the Board of Governors, Gavyn Davies, and the journalist at the centre of the controversy, Andrew Gilligan, resign. The UK media in general condemns the report as a whitewash.
24 June – The highest rated audience of the year is recorded in the UK as 20.66 million watch England's football match against Portugal in the quarter finals of Euro 2004. This was also the last programme in British television history to get over 20 million viewers as of 2010. 
5 July – 50th anniversary of television news broadcasts.
1 October – As part of its response to the Hutton Inquiry the BBC launches Newswatch, a programme providing a viewer and listener right-to-reply on BBC News's reporting and coverage of news events.
30 October – The BBC receives "hundreds of complaints" after reporter Barbara Plett describes herself crying when a frail Yasser Arafat was evacuated to France for medical treatment. Ultimately these complaints are partially upheld by the BBC Governors' Programme Complaints Committee.
1 November – The digital television station ITV3 is launched at 9:00pm, replacing Granada Plus.
18 November – The video for the new charity single Do They Know It's Christmas? by Band Aid 20 airs simultaneously on all five main UK television networks, as well as over twenty satellite and cable stations. This unprecedented broadcast attracts over fourteen million viewers between 5:50 and 6 p.m..