evidence: The participants to the agreement comprised two sovereign states (the United Kingdom and the Republic of Ireland) with armed and police forces involved in the Troubles. Two political parties, Sinn Féin and the PUP, were linked to paramilitary organisations: the IRA and the UVF respectively. The UDP, which was linked to the UDA, had withdrawn from the talks three months previously. [...] In 2004, negotiations were held between the two governments, the DUP, and Sinn Féin on an agreement to re-establish the institutions. These talks failed, but a document published by the governments detailing changes to the Belfast Agreement became known as the "Comprehensive Agreement". On 26 September 2005, it was announced that the Provisional Irish Republican Army had completely decommissioned its arsenal of weapons and "put them beyond use". Nonetheless, many unionists notably the DUP, remained sceptical. Of the loyalist paramilitaries, only the Loyalist Volunteer Force had decommissioned any weapons.[27] Further negotiations took place in October 2006, leading to the St Andrews Agreement.