Anticholinergic drugs are currently indicated for all severities of COPD, due to the dominance of cholinergic tone in the pathological process of the disease. SPIRIVA is a new long acting anticholinergic, which has showed the benefits of improved lung function, dyspnoea, health status and less exacerbations compared to ipratropium, salmeterol and placebo in secondary care (hospital setting). The study will determine if the same effect is seen on the on lung function and dyspnoea when either SPIRIVA or placebo is added to the usual therapy /care of COPD patients naïve to anticholinergic agents managed in primary care.