OOPS - Please keep in mind that a HEMS helicopter is not a SAR Helicopter. If someone rings 999 and asks for an ambulance then the control will assess the location and incident and possibly respond a HEMS unit. If the incident is aviation related then our control automatically informs the RCC of the response so that we can co-ordinate. I can not perceive of any method that would enable us to decide whether a climbing incident will require a full SAR response without us getting there first.
We have a good working relationship with the RCC and have never been afraid of requesting SAR support when required - don't forget there is life after being a SAR pilot and a fair few of them end up flying on HEMS units.
Regards.
TeeS