The goal of this clinical trial is to develop and investigate a compassion-based intervention (Mindful Self-Compassion course) in people with multiple sclerosis. The main objectives are:

1. Explore feasibility of trial processes including recruitment, adherence, retention, and follow-up
2. Explore experiences of people with multiple sclerosis with the Compassion-based intervention, including perceived effects, barriers and facilitators to participation, suggestions for improvement
3. Determine potential effects on stress, anxiety, depression, emotion regulation, illness adjustment, and self-compassion.

Participants will be asked to take part in an 8-week online Mindful Self-Compassion course and report changes in levels of stress, anxiety, depression, self-compassion, adjustment, emotion, and quality of life from pre- to post-intervention and at 3-month follow-up. Additionally, participants will be asked to take part in a semi-structured interview to explore their experiences with the course, perceived effects, and suggestions for improvement.

Inclusion Criteria:

1. Aged 18 years or older
2. Able to understand spoken and written English
3. Have a neurologist-confirmed diagnosis of multiple sclerosis
4. Willing to take place in an Mindful Self Compassion course

Exclusion Criteria:

1. Cognitive impairment (<26 on the Montreal Cognitive Assessment)
2. Severe active mental health impairment (psychosis, suicidality)