The COPD proof of concept project is designed to trial 3 separate, but integrated, methods of home monitoring. 50 patients have been selected from West Surrey Health Authority.  Each patient has a history of acute exacerbations that often lead to hospital admittance. The aim of the trial is to provide evidence to support the clinical view that hospital admissions can be reduced by intervening at an earlier stage during the onset of an exacerbation. COPD is recognised as both a major cause of winter pressures on the NHS, and of premature deaths in the UK. It is also the third most common cause of lost working days through certified illness.  