Key events affecting the Welsh Ambulance Service from the past few months, as the organisation sees three different people in charge since March 2006.
25 May 2006: Roger Thayne quits as interim ambulance trust chief executive. His deputy Dr Anton van Dellen remains and is appointed the new interim chief.
6 June: Mr Thayne warns the service is in "crisis".
20 June: Welsh assembly votes for public inquiry into the ambulance service.
27 June: Dr van Dellen warns cuts in staff could put public at risk.
28 June: Figures show worries over sickness levels in the service.
The trust has had three chief executives since March 2006
24 July: Dr van Dellen resigns as interim chief executive.
7 August: Alan Murray is appointed as the new chief executive of the service.
26 September: Mr Murray says £140m needs to be invested in the Welsh Ambulance Service, with £20m "up front".
12 October: A £16m fleet of 119 new ambulances is announced by the Welsh health minister, as a "first step" towards modernisation.
4 December: The public inqury by auditor general Jeremy Colman found a lack of direction and weak leadership led to longstanding poor performance by the ambulance service. It made 28 recommendations.
11 January 2007: A report by Healthcare Inspectorate Wales was concerned lives were being lost and the service faced "significant challenges".
10-12 February: 'Special emergency' in Cardiff and the Vale of Glamorgan after record demand on the service. More problems are reported later in the month, and at the Royal Glamorgan hospital at Llantrisant.