Briefing for
Best Interests Assessors

Mental Capacity, Welfare, Court of Protection & Adult Social Care
April 2026 briefing, updated 7 June 2026 | Compiled by Tala & DCC-i Crew

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Core message for BIAs

Recent developments reinforce that best-interests decision-making is a rights-based, evidence-driven process, not a professional preference exercise.

BIAs are expected to demonstrate rigour, timeliness, proportionality and clear recording, particularly where liberty, family life or life-sustaining treatment is affected.

June 2026 update

Deprivation of Liberty: Cheshire West no longer stands as a simple acid test

A Reference by the Attorney General for Northern Ireland [2026] UKSC 16, handed down on 2 June 2026, is a major Article 5 development. The Supreme Court held that the minister would not act incompatibly with Article 5 by issuing a revised Northern Ireland code recognising that a person who lacks domestic-law capacity for residence and care arrangements may still express valid consent for Article 5 purposes.

What this means for BIA practice
  • Do not rely on the Cheshire West formulation alone as a complete answer to whether arrangements amount to a deprivation of liberty.
  • Look at the person's concrete situation, including the type, duration, effect and manner of implementation of restrictions.
  • Record wishes, feelings, objection, assent and the quality of any apparent consent with care. Where there is serious doubt, do not assume valid consent.
  • Treat this as a live practice update. Local policies, supervisory-body guidance and any England and Wales implementation response should be checked before changing operational thresholds.

See also the 39 Essex Chambers rapid-response note for specialist commentary on the judgment's implications.

Capacity + Best Interests

Mental Capacity Act: assessing capacity and best interests

Capacity assessments - avoiding common errors

CT v LB Lambeth [2025] EWCOP 6 (T3): start with the functional test, not impairment. Do not reason from diagnosis to incapacity.

  • Avoid embedding mental impairment into the relevant information.
  • Record the decision-specific and time-specific factual matrix.
Best interests is a process, not an outcome

Reasonable professionals may reach different lawful conclusions if the s.4 MCA checklist has been properly applied.

  • Record P's wishes and feelings.
  • Explain the weight given to those wishes.
  • Show why less restrictive alternatives are insufficient.
Treatment

Life-sustaining treatment & clinical decisions

Townsend v Epsom & St Helier NHS Trust [2026] EWCA Civ 195: no clinical carve-out from best interests. Decisions to withdraw or withhold life-sustaining treatment for a person lacking capacity must be taken in P's best interests.

Practice implications
  • Expect earlier Court involvement where health decisions significantly affect life or liberty.
  • Show that welfare, dignity and P's values were actively considered.
DoLS + Article 5

Deprivation of Liberty & human rights

Delays in MCA and DoLS assessments can become human rights risks. The June 2026 Supreme Court judgment also means BIAs should avoid treating continuous supervision and not free to leave as a self-contained answer in every case. See the October 2025 Southampton CC Ombudsman reporting.

Practice implications
  • Treat delays, backlog and poor recording as rights risks.
  • Review restrictions actively; do not simply roll them forward due to system pressure.
  • Record the person's concrete situation, wishes, feelings and any objection or assent.
  • Recommend conditions that reduce restriction and evidence rejected alternatives.
Deputies + Article 8

Welfare deputies and Article 8

Re XY [2025] EWCOP 55 (T2): deputy authority must be explicit, limited and compatible with Article 8 rights.

Practice implications
  • Scrutinise claims that "the deputy has authority".
  • Consider whether the decision requires Court authorisation.
  • Remain alert to over-restriction of contact, social life or autonomy.
Autonomy

Autonomy, vulnerability and support

Re W [2025] EWCOP 32 (T2): capacity can coexist with vulnerability. Supportive safeguards are different from substituted decision-making.

Practice implications
  • Do not conflate vulnerability, safeguarding risk and incapacity.
  • Treat support to exercise capacity as a positive obligation.
Court of Protection

Issuing proceedings promptly

NHS South East London ICB v JP [2025] EWCOP 4 / [2025] EWCOP 8: serious best-interests disputes need prompt escalation.

Escalate early where...
  • Family disagreement is entrenched.
  • Liberty, Article 5 safeguards or life-sustaining treatment is at stake.
  • Restrictive arrangements lack clear legal authority.
Ombudsman

Ombudsman outcomes: key learning for BIAs

Ombudsman findings repeatedly criticise missing visit records, unexplained delay and unsupported assumptions about best interests.

Practice takeaway
  • Keep a clear record of visits and evidence-gathering.
  • Explain any delay and what has been done to reduce rights risks.
  • Do not rely on assumptions: link evidence to analysis and conclusion.

What BIAs should prioritise now

1

Explicit human rights analysis: Articles 5 and 8 in restrictive cases, including the June 2026 Article 5 update.

2

Clear audit trails linking evidence to analysis to conclusion.

3

Active challenge to blanket or convenience-based restrictions.

4

Early escalation to legal teams where authority is unclear.

5

Conditions and review periods that genuinely reduce restriction.

BIA recording checklist

Quick knowledge check

Which is the safest BIA approach?

Practical takeaway

"If it isn't clearly recorded, it didn't happen."

For queries or content suggestions, contact crew@dcc-i.co.uk.

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