Patients randomised to the intervention group will get immediate access to the Multi-professional breathlessness service (MBS).

Patients randomised to the control group will get delayed MBS intervention. They will receive standard care and get access to the service after a waiting time of eight weeks.

Patients visit the MBS twice. At week 1, delivered by palliative care specialists and respiratory disease specialists, patients receive an detailed assessment of breathlessness, relevant symptoms beyond breathlessness, psychosocial issues and carer burden. Recommendations are provided, and reviewed at the concluding visit in week 6 with palliative care specialists. In between these visits, weekly physiotherapy sessions focus on positioning, breathing techniques, exercise as well as pacing and fatigue management. Further support from the multi-professional expert team is given as needed.

Change from baseline in Mastery of breathlessness (at week 8) measured with the Chronic Respiratory Disease Questionnaire (CRQ) in a face-to-face interview. Mastery represents one of the four CRQ domains containing 4 items. Patients rate their experience on each item a 7-point scale ranging from 1 (maximum impairment) to 7 (no impairment). The subscale "Mastery" is calculated by averaging the scores of the 4 items belonging to this subscale.

Change from baseline in Quality of Life (at week 8) measured with the CRQ. The CRQ contains 20 items across four domains: dyspnea, fatigue, emotional function, and mastery. Quality of life is calculated by adding all responses to all 20 items. Patients rate their experience on each item a 7-point scale ranging from 1 (maximum impairment) to 7 (no impairment)

Change from baseline in palliative care needs and specific symptoms (at week 8) assessed with the Integrated Palliative Care Outcome Scale (IPOS). The IPOS includes 10 symptoms and 7 questions on patients and carers emotional situation, spiritual concerns, and provision of information and support. The overall profile score is the sum of the scores from each of the 17 questions.

Change from baseline in carers' burden (at week 8) assessed with the Zarit Burden Inventory (ZBI), measuring personal strain and role strain. The revised version contains 22 items. Each item is a statement which the carer is asked to endorse using a 5-point scale. Response options range from 0 (never) to 4 (nearly always).

Change from baseline in breathlessness severity (at week 8) measured with numerical rating scales (NRS). The NRS will be used to assess breathlessness over the last 24 hours on average,at rest and on exercise. Responses on a rating scale range from 1 (no breathlessness) to 10 (strongest imaginable breathlessness).