The beep of Dan Crook's emergency pager signals another job and he rushes off to the ambulance arrival bay.
James Oakes is elderly, hypothermic and confused. The paramedics fear sepsis.
"He's a farmer," says Dan. "He's soldiered on for a while but now he's critically ill. We need to get his temperature and oxygen levels up fast."
A patient like James should be seen in the resuscitation bay as well but it's full.
Instead he's assessed and stabilised in the ambulance area. It is only when he is eventually moved into a cubicle that the nurse has time to remove his muddy Wellington boots.
"How long will I be here for?" he asks. His animals need feeding. "I've never been to hospital before and I don't want to stay here long."