Dec 1999: The creation of the Scottish Parliament provided a new focus for haemophilia campaigners who had been fighting for years for truth after discovering they had been infected with blood borne viruses including HIV and hepatitis C in the 1970s and early 1980s.

The Parliament announces it will hold an internal inquiry into contaminated blood.

December 2002: An expert group under Lord Ross, makes an interim report to the health and community care committee. The final report was published in 2003, but campaigners say most recommendations were not implemented.

October 2004: Campaigners Bruce Norval and Andy Gunn protest at opening of the new Scottish Parliament building by throwing paint at it.

April 2006: Holyrood's health committee calls for a public inquiry. The call is rejected by then Labour health minister Andy Kerr MSP, a decision which campaigners challenge by seeking a judicial review.

Feb 2008: The Scottish Government loses the judicial review and must now investigate all deaths caused by contaminated blood or blood products.

April 2008: Nicola Sturgeon informs the Scottish Parliament that a public inquiry will be held, following an SNP manifesto pledge prior to the 2007 election.

January 2009: Lord Penrose is appointed to lead the public inquiry.

March 2009: Preliminary hearing of the Penrose Inquiry.

September 2010: The Penrose Inquiry publishes a 600-page preliminary report, which sets out the evidence and next stages of the investigation.

25 March 2015: The final report of the Penrose Inquiry - which was originally due in 2013 - is to be published.