Is demand for long term nursing about to tip NHS finances over the edge? Under the system of "Continuing Healthcare" people with complex medical needs can claim the costs of nursing and medical help to keep them out of hospital. But the system has become mired in controversy with many people claiming they've been denied funding to which they are entitled. Now there's a deluge of backdated claims against Clinical Commissioning Groups. File on 4 finds the backlog is creating long delays in new assessments of patients. And it hears claims the assessments themselves are a postcode lottery, with the chances of being deemed eligible varying wildly between GP commissioning groups. The programme also hears evidence of NHS commissioners and councils fighting each other not to take responsibility for patients. Patients and their families are going to the health ombudsman in their hundreds. 18 clinical commissioning groups are already going to end the year in the red, with some threatened with being put in special measures over their finances. Now they owe millions of pounds in backdated claims, plus interest. Is this creating an incentive to squeeze spending on continuing care? GP commissioners are about to be asked to put £1.9 billion into the pot for new joined-up health and social care services. Do they have the money, or the will, to buy into joined-up care? Reporter: Jane Deith Producer: Nicola Dowling.