Inclusion Criteria:  Patients: Age 10-25 years Diagnosis of MS or NMOSD (including MOG) prior to 18 years Living in England or Wales Currently monitored by the JR in Oxford, or GOSH or Evelina in London With the capacity to assent/ consent Parents Parent of a young person with MS or NMOSD (including MOG) Child must have been diagnosed prior to the age of 18 Living in England or Wales With the capacity to consent Clinicians Health care practitioner from medical, nursing and AHP backgrounds With at least two years' experience working in MS and NMSOD clinics (adult or paediatric).  Exclusion Criteria:  Unable to give informed consent Unable to communicate or participate safely (as determined by themselves or their parents/carers)