Whether it has concerns that no ambulance control room was operating on 21 July 2010.

It is not the case that no ambulance control room was operating on 21 July 2010. The Scottish Ambulance Service experienced disruption in their normal call handling operations on 21 July and there was a period of 50 minutes when all three Emergency Medical Dispatch Centres (EMDCs) were out of operation while a controlled close down and restart was carried out.
The Scottish Ambulance Service swiftly put in place contingency plans to support 999 calls while the operation of the EMDCs was compromised. However, any compromise of the call handling operations of the Scottish Ambulance Service is of concern and the Scottish Ambulance Service therefore instructed BT to undertake a full review of the resilience of the telephony system.
The Scottish Ambulance Service have been undertaking a thorough investigation in to the incident on 21 July. This has included reviewing the sequence of events on the day, considering how the contingency arrangements worked, understanding what the impact was on service delivery and, most importantly, auditing the clinical outcomes for patients. The ambulance service have been focussing on learning lessons and identifying actions that need to be taken forward by the service and others.
As part of their investigation, the Scottish Ambulance Service have undertaken a clinical audit that has reviewed every 999 call on the day, as well as all of those patients for whom an ambulance was requested within one hour or two hours by their GP, with particular focus on the 125 patients who were routed outside of Scotland for their calls to be answered. Dr George Crooks, Medical Director of the Scottish Ambulance Service, has informed me that the clinical case mix and outcomes achieved on 21 July reflected those experienced when the service is working as normal and that there were no adverse outcomes attributable to the delays associated with the buddy system.