A national service, called Streetlink, was established in 2012 to help members of the public obtain near-immediate assistance for specific rough sleepers, with the support of the Government (as housing is a devolved matter, the service currently only extends to England). The annual number of homeless households in England peaked in 2003–04 at 135,420 before falling to a low of 40,020 in 2009–10. In 2017–18, there were 56,600 homeless households, which was 60 per cent below the 2003–04 peak, and 40 per cent higher than the 2009–10 low. The UK has more than 120,000 children in temporary accommodation, a number which has increased from 69,050 children in 2010.In 2007 the official figures for England were that an average of 498 people slept rough each night, with 248 of those in London.Homelessness in England since 2010 has been rising. By 2016 it is estimated the numbers sleeping rough had more than doubled since 2010. The National Audit Office say in relation to homelessness in England 2010–17 there has been a 60% rise in households living in temporary accommodation and a rise of 134% in rough sleepers. It is estimated 4,751 people bedded down outside overnight in England in 2017, up 15% on previous year.
Constrictive pericarditis is a medical condition characterized by a thickened, fibrotic pericardium, limiting the hearts ability to function normally. In many cases, the condition continues to be difficult to diagnose and therefore benefits from a good understanding of the underlying cause. Signs and symptoms
Signs and symptoms of constrictive pericarditis are consistent with the following: fatigue, swollen abdomen, difficulty breathing (dyspnea), swelling of legs and general weakness. Related conditions are bacterial pericarditis, pericarditis and pericarditis after a heart attack. Causes
The cause of constrictive pericarditis in the developing world are idiopathic in origin, though likely infectious in nature. In regions where tuberculosis is common, it is the cause in a large portion of cases. Causes of constrictive pericarditis include:

Tuberculosis
Incomplete drainage of purulent pericarditis
Fungal and parasitic infections
Chronic pericarditis
Postviral pericarditis
Postsurgical
Following MI, post-myocardial infarction
In association with pulmonary asbestos

Pathophysiology
The pathophysiological characteristics of constrictive pericarditis are due to a thickened, fibrotic pericardium that forms a non-compliant shell around the heart. This shell prevents the heart from expanding when blood enters it. This results in significant respiratory variation in blood flow in the chambers of the heart.During inspiration, pressure in the thoracic cavity decreases but is not relayed to the left atrium, subsequently a reduction in flow to the left atrium and ventricle happens.