1994 - Piers Morgan appointed editor of The Mirror after being poached from The News of the World.
1999 - An unnamed Mirror executive pays private investigators for mobile phone numbers and PIN access codes to voicemails. At this time it is not illegal to listen to voicemails.
2000 - Morgan is implicated in the City Slickers scandal after he buys shares in a company tipped by his paper. The column’s authors are sacked and later prosecuted but Morgan is cleared of any wrongdoing.
2001 - Tina Weaver, a former prize-winning showbiz reporter, is appointed editor of The Sunday Mirror.
2002 - Footballer Garry Flitcroft is the subject of stories about extra-marital affairs after an injunction is overturned. Among the papers publishing stories is The People.
2002 - On 12 April, The Mirror publishes its front page exclusive revealing an affair between Sven Goran Eriksson and Ulrika Jonsson. The story later wins “Scoop of the Year” at the British Press Awards.
2003- 2005 - Soap opera actor Shobna Gulati, who has appeared in both EastEnders and Coronation Street, is the subject of several articles published in The Sunday Mirror.
2003 - Sly Bailey, head of magazine publisher IPC, becomes Trinity Mirror chief executive.
2004 - Piers Morgan is sacked from the Mirror after the paper publishes showing abuse of Iraqi prisoners by British soldiers, later shown to be fakes. He is succeeded by Richard Wallace.
2005 - On 3 July, The People publishes a story concerning Abbie Gibson, former nanny to David and Victoria Beckham. The paper, whose story related to voicemails allegedly left on Miss Gibson’s phone, later apologises and pays damages to Mr Beckham.
2007 - January 7, News of the World royal editor Clive Goodman and the private investigator Glenn Mulcaire are convicted and jailed for hacking the phones of celebrities and member of the Royal household. There is no link to Mirror Group titles.
2009 - At a lunch with Ulrika Jonsson and Jeremy Paxman, Morgan explains to the BBC Newsnight presenter how to prevent his voicemail messages from being accessed.
2011 - On 20 December, Morgan, having joined CNN in 2010, tells the Leveson Inquiry that he had “no reason or knowledge to believe [phone hacking] was going on” while he edited The Mirror.
2012 - On 16 January, Bailey explains to the Leveson inquiry that the paper has never been shown evidence that phone hacking has taken place and therefore not investigated it.
Weaver and Wallace are made redundant from The Mirror and The Sunday Mirror on 30 May after resisting merger of their titles. They are replaced by Lloyd Embley as head of the merged seven-day operation.
On 22 October, claims for damages arising from alleged voicemail hacking are lodged at the High Court against Trinity Mirror by Sven Goran Eriksson, Shobna Gulati, Abbie Gibson and Garry Flitcroft.