the royal college of nursing has warned if there is no movement on pay there will be continued action. other health unions likewise. with no indication of a shift by ministers. hugh pym, bbc news. ambulance services across england and wales have been talking to unions about what level of service they can provide tomorrow. each ambulance trust has agreed something different so the level of provision will depend on where you live. when you call 999, ambulance staff in england put your call into a category. category i is for life threatening illnesses or injuries, including cardiac arrest. category 2 is for emergency calls, for example strokes. category 3 is classed as urgent, and includes the late stages of labour. and category 4 is for less urgent calls, for example vomiting.