Self-employment is a good and realistic option for many with a disability due to the good support available. You can also still apply to Access to work for support like for disability equipment or support worker help or transport help if you are self-employed. These links provided detailed information and many case study examples.
Department of work and pensions Starting your own business a guide for disabled entrepreneurs is a very detailed and useful guide for information and case studies http://media.wix.com/ugd/7da63c_165f8309906b486ba49e4c5b3be7aa62.pdf
Ki Kaleidoscope is an investment training programme helping those with a disability with funding, mentors and skills for self-employed https://www.kaleidoscopeinvestments.com/
Scope charity Self Employment advice, the disability charity offer detailed self-employment advice for those with disabilities https://www.scope.org.uk/advice-and-support/get-ready-for-self-employment
The Princess Trust helps young disadvantaged people up to 30 start a business. Disability one area they work with https://www.princes-trust.org.uk/help-for-young-people/support-starting-business?utm_expid=.ffrM7V0UQ4SdWjaz5vsSkg.0&utm_referrer=https%3A%2F%2Fwww.princes-trust.org.uk%2Fhelp-for-young-people
Stelios Disabled Entrepreneur award https://www.leonardcheshire.org/about-us/press-and-media/press-releases/bristolian-flies-high-win-stelios-award-2018
Inclusive films document mini videos of people with learning disabilities making self-employment work well for them https://inclusivefilms.org/self-employment/
Inclusive films document mini videos of people with a history of mental health issues making self-employment work well for them https://inclusivefilms.org/self-employment-for-people-with-mental-health-problems/
The Foundation for people with learning difficulties do lots of detailed information booklets including an easy read option on self-employment as a work option. These include looking at business ideas, business plans and self-assessment. They also run as part of their In Business programme workshops https://www.mentalhealth.org.uk/learning-disabilities/our-work/employment-education/self-employment-business-programme