Mental capacity and mental illness

The Mental Capacity Act 2005

This information explains what mental capacity is and how the Mental Capacity Act works. It also explains who can make decisions for you if you lose capacity. This information is for people who are 18 or over and affected by mental illness in England. It is also for their loved ones, carers and anyone interested in this subject.

Frequently asked Q's

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© Rethink Mental Illness 2026

Last updated August 2025
Next update August 2028, subject to any changes

Version number 9.1