A Study to Show That Flutiform is Well Tolerated and Effective in the Treatment of COPD

Inclusion: 1. Male or Female subjects aged ≥ 40 years at screening visit: 1. Female subjects of child bearing potential (less than 1 year post-menopausal) must have a negative urine pregnancy test prior to first dose of study medication, be non-lactating, and willing to use adequate and highly effective methods of birth control throughout the study such as sterilisation, implants, injectables, combined oral contraceptives, some intra-uterine devices, sexual abstinence or vasectomised partner. 2. Male subjects with a partner of child bearing potential must be willing to use adequate and highly effective methods of birth control throughout the study 2. Smoking history of ≥10 packs per year. 3. Diagnosis of COPD 4. History of ≥ moderate or severe COPD exacerbations in previous year. 5. Willing and able to replace current COPD therapy with study medication. 6. Able to demonstrate correct use of a pMDI without a spacer. 7. Willing and able to attend all study visits and complete study assessments. 8. Able to provide signed informed consent. Exclusion: 1. Ongoing moderate or severe exacerbation of COPD (see section 10) 2. Current diagnosis of asthma 3. Documented evidence of α1-antitrypsin deficiency as the underlying cause of COPD 4. Other active respiratory disease such as active tuberculosis, lung cancer, bronchiectasis, sarcoidosis, lung fibrosis, pulmonary hypertension, interstitial lung disease, cystic fibrosis, bronchiolitis obliterans 5. Previous lung resection 6. Use of long-term oxygen therapy (LTOT) at least 12 hours daily or mechanical ventilation 7. Chest X-ray or CT scan that reveals evidence of clinically significant abnormalities reflective of active disease not believed to be due to COPD 8. Evidence of uncontrolled cardiovascular disease 9. Evidence of clinically significant renal, hepatic, gastrointestinal, or psychiatric disease 10. Current malignancy or a previous history of cancer which has been in remission for \< 5 years (basal cell or squamous cell carcinoma of the skin which has been resected is not excluded) 11. Clinically significant sleep apnoea requiring use of continuous positive airway pressure (CPAP) device or non-invasive positive pressure ventilation (NIPPV) device 12. Participation in the acute phase of a pulmonary rehabilitation programme within 4 weeks prior to screening or during the study 13. Known or suspected history of drug or alcohol abuse in the last 2 years 14. Requiring treatment with any of the prohibited concomitant medications 15. Known or suspected hypersensitivity or contraindication to any of the study drugs or excipients 16. Received an investigational drug within 30 days of the screening visit (12 weeks if an oral or injectable steroid).