Mental Capacity Act

A statutory framework for people who lack capacity to make decisions for themselves

Introduction

The Mental Capacity Act 2005 covers a very wide range of decision making for people living in their own homes, in hospital or in formal care settings such as care homes. It provides the legal framework and guidance for:

  • Thinking about people’s ability to make their own decisions
  • How to make decisions on someone else’s behalf if they are not able to do so

The Mental Capacity Act 2005 sets out five principles. They are the basis for all decision-making for other people.

A blue handprint. Each finger contains a number, from one on the thumb to five on the little finger

  1. We should assume a person is able to make their own decisions unless we have evidence to the contrary.
  2. We should take all practicable steps to help them make their own decision before we conclude they lack capacity.
  3. If a person does something we think is unwise, this does not automatically mean they lack capacity.
  4. If we need to make a decision for a person who lacks capacity, we must work out what is in their best interests.
  5. If we make a best interests decision, we should do it in the way which is the least restrictive of their liberty and least distressing for them.

It is only necessary to think about a person’s mental capacity at the time they need to make a specific decision.  

They may have capacity to make some decisions but not others because some decisions are easier. This information is to help family carers, professionals in health or social care and people who work for an organisation providing care services. The links below provide a wide range of helpful resources. The information covers many aspects of helping or working with people who may struggle with decision-making.

About mental capacity and the Act

Information for members of the public including family carers

Making decisions for another person

information

The UK Supreme Court issued a landmark judgment on 2nd June 2026 which overturns the established legal definition of deprivation of liberty set out in the 2014 Cheshire West case A Reference by the Attorney General for Northern Ireland of a devolution issue under paragraph 34 of Schedule 10 to the Northern Ireland Act 1998

The Department of Health and Social Care (DHSC) published interim guidance on 15th June 2026: Changes to the definition of deprivation of liberty – GOV.UK.

DHSC will publish further guidance in due course.

Therefore, DoLS information on our website is currently under review and will be updated when formal guidance becomes available.

Deprivation of Liberty Safeguards (DoLS) applications

Deprivation of Liberty Safeguards (DoLS) applications cannot be made by members of the public. Applications can only be made by care homes or hospitals.

If you need help with a Deprivation of Liberty Safeguards (DoLS) application for someone in Somerset who is in a care home or hospital, you should contact the DoLS Team for advice. Please email the team at dolsinformation@somerset.gov.uk. This mailbox is constantly monitored on weekdays but not on Bank Holidays.

Staff who work in care homes and hospitals can use the application form on this Professional Choices webpage.

Information for professionals

Mental Capacity Act information for those working in an organisation providing direct care such as a care home, domiciliary care, day care or self-employed as a Shared Lives carer or micro-provider  link to Professional Choices

Mental Capacity Act information for those employed in a statutory agency such as Somerset Council, the NHS, Police.

Last updated: June 24, 2026

Next review due: December 24, 2026

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