Panorama reports on a week spent in the accident and emergency department of the University Hospital of North Tees in Stockton, as this vital part of the NHS faces unprecedented pressure. It is the second programme Panorama has made in this hospital. One year on, why have things changed so much? There are more patients who are more ill, others who should never have come to A&E in the first place, and the hospital's 'regulars' - one has come in over 100 times. Panorama talks to patients and to stressed and overstretched staff, the front line troops of the NHS.