Legal Definition
Under UK law, arthritis is a disability if it substantially and long-term limits your ability to carry out normal day-to-day activities. This includes work, self-care, mobility, relationships.
What 'Substantial' Means
More than minor or trivial impact. If arthritis stops you doing something most people do, it's substantial. Examples: unable to walk far, can't dress yourself, can't work full-time.
Your Rights
Protection from discrimination, access to reasonable adjustments, eligibility for benefits, right to flexible working, occupational health support at work.
Telling People
You don't have to disclose disability to employers unless you need adjustments. Some people worry about stigma, but disclosure often helps.