Hidden Harm: Recognising and Responding to Parental Substance Misuse

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Section 1

Executive Summary

"Hidden Harm" is the term coined by the Advisory Council on the Misuse of Drugs (ACMD) in its landmark 2003 report to describe the largely invisible suffering of children living with parents or carers who misuse drugs or alcohol. The harm is "hidden" because affected children rarely disclose, practitioners may not ask directly, and the family often presents a functional facade to the outside world.

This resource is designed for Designated Safeguarding Leads (DSLs), social workers, health visitors, school staff, and all practitioners who work with families. It outlines the legal and procedural framework for responding to concerns, provides a structured indicators guide, and maps the multi-agency threshold system from Early Help through to statutory intervention under Section 47 of the Children Act 1989.

2.6M

children in England live with a parent who misuses alcohol
(Alcohol Change UK, 2023)

500K+

children affected by parental drug misuse in England
(ACMD Hidden Harm follow-up estimates)

~40%

of serious case reviews involve parental alcohol or drug misuse
(NSPCC, 2024)

Section 2

Background & Prevalence

The Hidden Harm Report (ACMD, 2003)

The Advisory Council on the Misuse of Drugs published Hidden Harm: Responding to the Needs of Children of Problem Drug Users in 2003 following mounting evidence that children of parents with severe drug dependency were experiencing serious, and often unaddressed, developmental harm. The report estimated that between 250,000 and 350,000 children in England and Wales were living with a parent with a serious drug problem — at the time, around one child for every problematic drug user. Subsequent follow-up reports (2007, 2011) confirmed that progress had been insufficient and that the same children were repeatedly appearing in child protection and looked-after-children statistics.

The Toxic Trio

Research by Brandon et al. (2020) for the Department for Education identified a consistent "Toxic Trio" present in the most serious safeguarding cases: domestic abuse, parental mental ill-health, and substance misuse. These three factors rarely occur in isolation and their co-occurrence exponentially increases risk to children. Practitioners should never assess substance misuse in isolation — a full picture of the family environment is essential.

Current Prevalence

An estimated 2.6 million children in England live with at least one parent who misuses alcohol (Alcohol Change UK / Public Health England, 2023).
Around 500,000 children are estimated to be affected by parental drug misuse, including Class A drugs such as heroin, cocaine, and crack cocaine (ACMD follow-up estimates, Home Office).
Parental alcohol misuse alone is estimated to cost the UK economy over £4.7 billion per year in child welfare, health, and justice costs (Alcohol Change UK, 2022).
Children born to parents with opioid dependency account for a disproportionate share of Neonatal Abstinence Syndrome (NAS) admissions — approximately 1,500 NAS births are recorded annually in England (NICE guidance NG62).
Parental substance misuse features in approximately 40% of all serious case reviews in England (NSPCC Annual Review of Case Reviews, 2024).

Statutory Reference

Parental substance misuse falls within the definition of "significant harm" under Section 31 of the Children Act 1989 where it "impairs, or is likely to impair, the child's health or development." Working Together to Safeguard Children 2023 specifically identifies substance misuse by parents as a key risk factor requiring a multi-agency safeguarding response.

Section 3

Signs & Indicators of Parental Substance Misuse

No single indicator is definitive. Concerns should be assessed in the round, with information gathered from multiple sources. Use this table to structure observations — not as a checklist that confirms or rules out harm.

Sign or Indicator	What You Might Observe	Safeguarding Consideration
Visible intoxication	Slurred speech, unsteady gait, glassy or unfocused eyes at school collection or home visits	Immediate risk if driving with children present; inability to supervise
Track marks / skin picking	Needle marks on forearms, wrists, legs, or neck; open sores from skin picking (methamphetamine/crack cocaine)	Risk of sharps accessible to children; risk of blood-borne virus transmission
Significant weight loss	Rapid or unexplained weight loss, sunken features	May indicate inability to attend to basic needs — parent's and child's nutrition
Poor personal hygiene	Clothing unwashed, strong body odour, dental decay	May indicate neglect of self-care that extends to child care
Withdrawal symptoms	Shaking hands, sweating, visible nausea in morning interactions	Alcohol dependency in particular; indicates daily heavy use
Drowsiness or unconsciousness	Falling asleep mid-conversation, very slow speech, hard to rouse	Opioid use; child left effectively unsupervised

Sign or Indicator	What You Might Observe	Safeguarding Consideration
Unpredictable mood or aggression	Significant mood swings, disproportionate anger at school or with professionals	Risk of emotional harm or domestic violence in the home
Missed appointments	Repeated failure to attend school reviews, CIN meetings, or GP appointments	May indicate disorganised parenting or active use making engagement impossible
Minimising or denial	Downplaying concerns raised, deflecting questions about alcohol or drug use	Classic defensive behaviour; does not mean concerns are wrong
Financial instability	Mentions of debt, utilities cut off, child without lunch money or uniform	Financial pressure of sustaining a habit often leads to neglect of child needs
Social isolation	Parent appears to have no support network; child rarely has friends over	Reduces natural oversight and protective factors for the child
Parentification of the child	Child described as "looking after" the parent, collecting younger siblings, making decisions	Serious developmental harm — child assuming adult carer role

Sign or Indicator	What You Might Observe	Safeguarding Consideration
Paraphernalia accessible	Needles, foil, pipes, spoons, or large quantities of alcohol left accessible to children	Direct physical risk; immediate child protection concern
Poor home conditions	Overflowing rubbish, no food in the house, no heating, broken windows unrepaired	Physical neglect; risk of injury and malnutrition
Chaotic household routines	No regular bedtimes, mealtimes, or school preparation; multiple unknown adults present	Developmental harm from lack of routine; county lines risk if unknown adults present
Frequent visitors at unusual hours	Late-night knocking, people arriving and leaving quickly, described by child as "Dad's friends"	Drug supply/dealing at home; child exposed to criminality and unfamiliar adults
Evidence of self-medication	Large quantities of prescription medication, OTC sedatives, or unidentified tablets unsecured	Risk of accidental ingestion by young children; overdose risk

Sign or Indicator	What You Might Observe	Safeguarding Consideration
Persistent lateness or absence	Regular unexplained lateness to school, persistent absence without medical explanation	May indicate parent unable to maintain routine; child may be caring at home
Child distressed at collection	Child visibly anxious or reluctant when parent arrives; clings to school staff	Fear of returning home; possible indicator of unsafe home environment
Hunger and poor nutrition	Child consistently hungry at school, hoarding food, always requesting extras at lunch	Physical neglect — feeding the habit takes priority over feeding the child
Age-inappropriate knowledge	Child uses drug terminology accurately, knows how to "hide things" from professionals, describes adult situations	Direct exposure to substance use environment; potential exploitation risk
Emotional regulation difficulties	Chronic anxiety, hypervigilance, explosive behaviour, or extreme withdrawal from peers	Trauma response to unpredictable home environment; requires specialist therapeutic support
Secrecy about home life	Child refuses to discuss home, deflects questions, clearly rehearsed answers	Child may have been coached not to disclose; explore gently using PACE-informed approach

These indicators draw on ACMD (2003), NICE guidance PH43 (2014), and the Munro Review (2011). Always consult your agency's threshold document and seek supervision when uncertain.

Section 4

The Voice of the Child

Working Together to Safeguard Children 2023 makes explicit that every child's wishes and feelings must be ascertained and given due weight in all safeguarding decisions. In cases involving parental substance misuse, this principle is especially important — and especially difficult to implement. Children in these families are often deeply loyal to their parent, feel shame, fear consequences of disclosure, and have frequently been placed in the role of protector.

✅ Approaches that support disclosure

Use open, non-leading questions: "What is home like for you?"
Create time and privacy — not in the corridor between lessons
Validate feelings without making promises you cannot keep
Use PACE: Playfulness, Acceptance, Curiosity, Empathy (Dan Hughes)
Make clear the child is not in trouble and will not be taken away simply for talking

❌ Approaches that close conversations down

Leading questions: "Does your mum drink every day?"
Asking in front of siblings, peers, or other family members
Promising confidentiality you cannot guarantee
Expressing visible shock, disgust, or strong emotion
Pressing for information after a child has said they don't want to talk

All that a child says should be recorded verbatim, in ink, with date and time — immediately after the conversation ends, never from memory later. Record what was observed separately from what was said, and keep interpretation out of the factual record.

Section 5

UK Multi-Agency Threshold Framework

The threshold framework determines the level of statutory or non-statutory response required. Click each tier to expand. Refer to your local authority's threshold document, which will set out the specific criteria for your area in line with Working Together 2023.

Threshold criteria

• Child's needs are above universal but do not meet the threshold for a statutory assessment
• Parent is acknowledging concerns and engaging voluntarily with services
• Substance use is episodic rather than chronic; parenting capacity generally maintained
• No evidence of immediate or significant harm to the child

Typical response

• Common Assessment Framework (CAF) / Early Help Assessment (EHA)
• Team Around the Family (TAF) meeting convened
• Referral to community substance misuse service (CGL, local drug and alcohol service)
• Family support worker or Early Help keyworker allocated
• Regular review of progress — no less than every three months

Legal basis: Section 10, Children Act 2004 (duty to cooperate); local authority Early Help guidance. No single agency can demand a CAF — engagement must be voluntary at this level.

Threshold criteria

• Child's health or development is, or is likely to be, significantly impaired without support
• Parental substance misuse is chronic or escalating and affecting day-to-day parenting
• Child showing signs of neglect, developmental delay, or emotional harm
• Parent partially engaging or engaging inconsistently with services
• Early Help interventions have not improved the situation

Typical response

• Referral to Children's Social Care (CSC) for a Child in Need assessment (Section 17)
• Assessment within 45 working days (Working Together 2023)
• CIN Plan developed at a multi-agency Child in Need meeting
• Lead professional (usually social worker) allocated
• Substance misuse specialist involved in CIN meeting
• Review CIN Plan every 6 months minimum

Legal basis: Section 17, Children Act 1989. A Child in Need is defined as a child who is unlikely to achieve or maintain a reasonable standard of health or development without the provision of services by a local authority.

Threshold criteria — any of:

• Reasonable cause to suspect significant harm to the child
• Parent found unconscious or overdosed with child present
• Child found alone or unsupervised due to parental intoxication
• Paraphernalia or substances accessible to the child
• Child discloses witnessing drug preparation or supply
• Newborn with Neonatal Abstinence Syndrome (NAS) or fetal alcohol spectrum disorder
• CIN plan broken down; situation deteriorating despite intervention

Typical response

• Immediate referral to MASH / CSC — do not wait for parental consent if immediate risk
• Section 47 enquiry (duty to investigate) commences within 24 hours of strategy discussion
• Strategy discussion (CSC, police, health) within 24 hours
• Initial Child Protection Conference (ICPC) within 15 working days
• Child Protection Plan (CPP) with core group, lead social worker, and multi-agency review every 3 months
• If immediate danger: police power of protection (Section 46) or Emergency Protection Order (EPO)

Legal basis: Section 47, Children Act 1989 (duty to investigate). Emergency Protection Order: Section 44, Children Act 1989. Police Power of Protection: Section 46, Children Act 1989. Key principle: The child's safety is paramount — parental consent is not required to make a Section 47 referral.

Where a child cannot be safely maintained at home — despite Child Protection Plans and intensive support — the local authority may accommodate the child with parental agreement under Section 20, Children Act 1989, or seek a Care Order under Section 31 through the family courts. Parental substance misuse is one of the leading causes of care proceedings in England.

Children who become Looked After due to parental substance misuse are entitled to a Personal Education Plan (PEP) and a Personal Health Plan. DSLs must ensure that a child's Looked After status is known to the school's designated teacher for Looked After children.

Legal basis: Section 20 (voluntary accommodation) and Section 31 (Care Order), Children Act 1989. Children Act 1989 (s22): LA has a duty to safeguard and promote the welfare of any child in its care.

Section 6

Making a Referral: What to Record and When

Every practitioner has a professional responsibility to act on concerns about a child's welfare. If you have a concern, you should speak to your Designated Safeguarding Lead (DSL) immediately. The DSL will decide whether to consult MASH informally (without sharing the child's name initially) or proceed directly to a formal referral. You should escalate to the MASH directly if you cannot reach your DSL and there is immediate risk.

1

Identify & record

Write down what you have seen or heard — verbatim quotes, dates, times, witnesses. Separate observed facts from inferences. Use ink, not pencil.

2

Inform your DSL

Report to your DSL the same day. Provide your written record. The DSL must make a decision to refer or not, and record their reasoning either way.

3

MASH consultation (if threshold unclear)

DSLs can call MASH for a no-names "threshold consultation" to help determine whether a formal referral is appropriate. This is not a referral and does not start a formal process.

4

Formal referral to MASH

Referral should be made in writing (using the local authority's referral form) and verbally. The referral must include: child's full name, DOB, address, school, nature of concern, why it meets the threshold, and relevant history. CSC must acknowledge the referral within 1 working day.

5

Follow up & escalate if necessary

If you disagree with a decision not to refer or not to take action, follow your agency's escalation or professional challenge procedure. Working Together 2023 is explicit that professional disagreement must be managed through clear escalation pathways — not ignored.

⚠️ If the child is in immediate danger

Call 999 first. Do not wait to speak to your DSL if a child is in immediate danger. Contact police and emergency services, then inform your DSL immediately after.

Section 7

Talking to Parents: A Trauma-Informed Approach

In most cases, you should inform parents that a referral is being made — unless doing so would place the child at greater risk of harm, or would compromise a police investigation. Working Together 2023 requires this transparency. However, the conversation requires careful handling.

Substance misuse is frequently rooted in adverse childhood experiences (ACEs), trauma, and mental ill-health. A parent who misuses substances is not necessarily a "bad" parent — they may be struggling with a complex chronic condition. Practitioners who approach these conversations with curiosity and empathy, rather than judgement, are significantly more likely to secure engagement.

Principles for the conversation

✓Be direct but compassionate: "I need to be honest with you about what we've noticed, because we want to support your family."

✓Focus on the child's experience, not the parent's behaviour: "We're concerned about how [child] has been feeling."

✓Acknowledge difficulty: "I understand this is hard to hear."

✓Frame support as available: "There is help available that has supported other parents in similar situations."

✗Avoid ultimatum language: "If you don't stop drinking, we will have to…"

✗Avoid diagnosing: "It's clear you have a drink problem." Use: "I'm concerned about the role alcohol is playing."

Always have a second practitioner present if possible. Document the conversation immediately after. Never make promises about outcomes. If a parent becomes threatening or aggressive, end the meeting safely and note this in the referral.

Section 8

Resources & Signposting

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Your Local MASH

Multi-Agency Safeguarding Hubs receive referrals from any professional or member of the public with concerns about a child. Find your local team's number.

Find your MASH →

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Change Grow Live (CGL)

The UK's largest substance misuse charity. Provides community drug and alcohol services in over 80 local areas. Accepts self-referrals and professional referrals.

Visit CGL ↗

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Frank — Talk to Frank

National drug information and advice service. Confidential helpline for young people, parents, and professionals. 24 hours, 7 days a week.

0300 123 6600

Talk to Frank ↗

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Alcohol Change UK

Leading charity working to reduce alcohol harm. Offers guidance for families affected by someone else's drinking, and training resources for professionals.

Alcohol Change UK ↗

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NACOA — National Association for Children of Alcoholics

Dedicated support for children and adults affected by a parent's drinking. Helpline and online resources available.

0800 358 3456 (free)

NACOA ↗

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NSPCC — Professional Helpline

The NSPCC professional consultation helpline is available to anyone with concerns about a child's welfare, including concerns about parental substance misuse.

0808 800 5000 (free)

NSPCC ↗

Key Legislation & Statutory Guidance

Children Act 1989 (s17, s20, s31, s44, s46, s47) Children Act 2004 (s10 — duty to cooperate) Working Together to Safeguard Children 2023 KCSIE 2024 (in force September 2024) ACMD Hidden Harm Report 2003 NICE Guidance PH43 — Substance Misuse and Families (2014) Munro Review of Child Protection 2011 Brandon et al., Toxic Trio research, DfE (2020)