In cardiac arrest following trauma or suspected intra-cranial bleeding/ obviously pregnant/ Dependant on others for activities of daily living (ie any assistance with activities of daily living, in supported care or nursing home residents) or have pre-existing significant neurological injury,Likely to be "Not for Resuscitation" and/or admission to the Intensive Care Unit because of terminal disease or advanced age, Patients who are hypothermic already and are confirmed to be on temperature measurement/ in-hospital cardiac arrest.