If staff find themselves too fatigued to continue providing cover on standby, they should contact ambulance control and ask to be stood down.

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Some of the most extreme cases of recent inappropriate 999 calls to ambulance control centres in Scotland included a woman who was worried her tooth might fall out.

BBC: Ambulance service staff

The volunteers, who are known as community first responders (CFRs), are mobilised by ambulance control and although they often arrive ahead of the paramedics, an ambulance is always automatically despatched to any call attended by them.

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Sussex Police said the ambulance left the road and hit an electrical control box after the collision.

BBC: Ambulance crash

The ambulance service said conversations "between the hospital and both staff at the scene and staff in the control room" did not delay the departure and the decision to go to the Stoke-on-Trent hospital was taken before the child was put in the ambulance.

BBC: Holly Waters