 The study is entitled Is regular chest physiotherapy an effective treatment in severe, non cystic fibrosis bronchiectasis? This is a small randomised controlled pilot crossover study assessing the efficacy of regular chest physiotherapy using an Acapella mouthpiece in severe non cystic fibrosis bronchiectasis. 10 patients will be randomised to receive full instruction in use of the Acapella device twice daily therapy and ten patients will continue with their standard treatment regimen. The study will be conducted over seven months. 