Telling Family, Work and Others About Your Diagnosis in the UK

After a serious diagnosis, deciding who to tell — and when — can feel almost as difficult as the diagnosis itself. In most situations you are not legally required to disclose your condition to anyone. This guide covers what you are actually obliged to share, with whom, and some practical guidance on the conversations that matter. If you'd rather have a plan built around your situation, answer a few questions and we'll build one around you →

The starting point: disclosure is your choice

There is no general legal obligation to tell your employer, family, friends, bank, or most other people in your life about a medical diagnosis. Your health information is yours to share or not share, as you choose.

Under UK GDPR and the Data Protection Act 2018, health data is classified as special category data — the highest level of legal protection. Organisations including your employer, insurers, and banks can only collect, use, or share your health information with your explicit consent or under narrow, specific legal gateways. This means that if you tell your GP, your GP cannot tell your employer. If you tell your insurer during a claim, they cannot tell your bank. The law treats your health information as confidential by default.

The question of who to tell is therefore almost always a practical and personal decision, not a legal one — with a small number of well-defined exceptions discussed below.

Telling your employer

You are not required to tell your employer your diagnosis. If you need to take time off or request changes to how you work, you need only explain that a health condition is affecting your ability to work. "A medical condition" or "a health issue" is legally sufficient in most employment situations. You do not have to say it is cancer, or name any other condition.

The Equality Act 2010 is relevant here in two connected ways. First, it provides protection against disability discrimination — and cancer, HIV, and multiple sclerosis are automatically classified as disabilities under the Act from the point of diagnosis, regardless of whether the condition currently affects your daily activities. This means the law's protections apply to you immediately, before you've told your employer anything. Second, the duty on your employer to make reasonable adjustments is triggered once they know — or should know — that you have a disability. You don't need to use that word, but you do need to share enough for your employer to understand that your condition is affecting your work and that adjustments may be needed.

A fit note — what used to be called a sick note — does not have to name your diagnosis. A GP or other authorised clinician can state "not fit for work" or "may be fit for work" without specifying why. Your employer is not entitled to a diagnosis, only to evidence that a health condition explains the absence or the need for adjustments.

If you do choose to share more, your employer is bound by UK GDPR to treat that information with strict confidentiality and cannot share it further — including with colleagues — without your consent. If you believe your health information has been disclosed at work without your permission, you can complain to the Information Commissioner's Office (ICO) at ico.org.uk or call 0303 123 1113.

Put any agreed arrangements about leave, adjusted duties, or flexible working in writing — email is fine — so there is a clear record for both parties.

Medical confidentiality at work — Occupational Health

Your employer cannot contact your GP or specialist without your written consent. If they want medical information about you directly from your doctor, they must ask you first, and you must agree in writing before any contact is made.

Many employers refer employees on long-term sick leave to an Occupational Health (OH) adviser or physician. The OH practitioner is a clinician bound by medical confidentiality — they cannot share your medical details with your employer simply because your employer is paying for the service. Their role is to assess your fitness for work and advise both parties, not to act as an information conduit for the employer.

Under the Access to Medical Reports Act 1988, where your employer requests a medical report from a doctor who is, or has been, responsible for your clinical care — including for employment purposes — you have specific rights:

• The right to be told before the report is requested, and to withhold consent.
• The right to see the report before it is sent to your employer.
• The right to request corrections or additions to the report.
• The right to withhold your consent to the report being sent, even after you have seen it — though refusing may affect your employer's ability to put adjustments in place or manage your absence.

For OH reports prepared by an OH physician who is not your treating doctor, most reputable providers extend the same rights as a matter of good practice. Before attending an OH appointment, ask the OH provider what your rights are in relation to the report — specifically, whether you will have an opportunity to see it before it goes to your employer. The OH report can describe your functional limitations and what adjustments are recommended without naming your diagnosis if you have discussed this with the OH clinician beforehand.

Safety-critical roles — where disclosure may be required

A small number of occupational contexts carry specific disclosure obligations, where the safety of others depends on the medical fitness of the worker. If your role falls into one of these categories, the obligation is typically to your licensing or registration body — not necessarily to your employer directly — and applies regardless of employment law protections.

• Aviation — pilots, air traffic controllers, and certain other aviation personnel hold medical certificates issued by the Civil Aviation Authority (CAA). A serious diagnosis that may affect fitness to fly or control aircraft must be reported to the CAA's aviation medicine team. The CAA assesses each case individually; many conditions do not automatically end a flying career, but they must be declared. Contact the CAA Aeromedical Centre for guidance.
• Rail — train drivers and certain safety-critical rail workers are subject to medical fitness standards under the Train Drivers Licensing Regulations 2010. A condition that may affect the ability to perform safety-critical duties must be reported to the licensing authority and the employer's occupational health function. Guidance is available from the Office of Rail and Road (ORR).
• Maritime — seafarers must hold a valid medical certificate (ENG1 for most seafarers, ML5 for fishing vessel workers) issued against Maritime and Coastguard Agency (MCA) medical standards. A diagnosis that affects the ability to meet those standards must be reported to the MCA-approved doctor at your next medical examination, or sooner if safety is immediately affected.
• Healthcare professionals — doctors registered with the General Medical Council (GMC), nurses and midwives with the Nursing and Midwifery Council (NMC), pharmacists with the General Pharmaceutical Council (GPhC), and other regulated health professionals have obligations to consider whether their health condition affects their fitness to practise. The relevant regulator should be consulted if you are uncertain — most have occupational health guidance for registrants facing illness. The GMC advises doctors to seek advice from their own treating doctor and consider whether patient safety requires them to restrict their practice.
• Driving licence holders — DVLA rules — drivers of all vehicles have a legal duty under the Road Traffic Act 1988 not to drive if their condition or treatment affects their ability to do so safely. Beyond this, many conditions must be actively notified to the Driver and Vehicle Licensing Agency (DVLA) in England, Scotland, and Wales (or the Driver and Vehicle Agency (DVA) in Northern Ireland). The DVLA's published medical standards set out which conditions trigger a notification requirement — these include certain cardiac conditions, epilepsy, stroke, insulin-treated diabetes, specified visual field defects, and others. Group 2 licence holders (large goods vehicles, buses, and coaches) are subject to stricter medical standards than Group 1 holders. Check your specific condition at gov.uk/health-conditions-and-driving, or ask your GP or specialist whether notification is required. Driving while unfit and without notifying DVLA where required is a criminal offence.

If you are unsure whether your role or licence triggers a disclosure obligation, seek advice before you disclose — or before you decide not to. Your union, professional registration body, or a solicitor experienced in employment or regulatory law can advise.

Telling DWP when claiming benefits

To claim Universal Credit, New Style Employment and Support Allowance (ESA), or Personal Independence Payment (PIP), you are required to provide medical evidence — typically a fit note and a completed questionnaire — confirming your condition and how it affects your ability to work or carry out daily activities. This is a condition of the benefit, not a separate disclosure obligation.

The Department for Work and Pensions (DWP) is bound by UK GDPR and the Data Protection Act 2018. Health information you provide to DWP for the purposes of a benefit claim is used only to administer that claim. DWP cannot share your health information with your employer, your family, or other private organisations. You can apply for benefits entirely independently of what your employer or anyone else knows.

When you report a health condition to DWP through a Universal Credit journal or ESA claim, a Work Capability Assessment (WCA) is arranged by a DWP-contracted healthcare professional. Completing the WCA honestly and fully — including providing supporting medical evidence from your GP or specialist — gives you the best chance of being placed in the right category.

Telling your bank or lender

You are not legally required to tell your bank or any lender about your diagnosis. However, if your illness is affecting your income and your ability to meet repayments, voluntary early disclosure to your lender's financial difficulty team is generally in your interest.

Under FCA rules, lenders must treat customers in financial difficulty fairly and must genuinely consider hardship arrangements before pursuing repossession or default action. These arrangements — payment deferrals, interest-only periods, fee waivers, restructuring — are almost always easier to access before you fall into arrears rather than after. Contacting your lender proactively, while you are still making payments, puts you in a much stronger position.

You do not need to name your condition — saying that you are dealing with a health condition that is affecting your income is enough to open the hardship conversation. Importantly, your health condition is not recorded on your credit file. Credit reference agencies (Experian, Equifax, and TransUnion) record payment history and account behaviour, not the reasons behind it. Entering into a payment arrangement may appear on your credit file, but your diagnosis never will.

Telling your insurer

If you are making a claim on an existing policy, you must notify your insurer promptly — most policies include a notification requirement, and delay can complicate an otherwise valid claim.

A separate issue arises with new policy applications. Under the Insurance Act 2015, when applying for a new insurance policy you have a duty of fair presentation: you must disclose material information that you know or that a reasonable person in your position would know is relevant to the insurer's decision to offer cover and on what terms. Your diagnosis is almost certainly material information. Failing to disclose it when applying for a new policy after diagnosis constitutes a breach of this duty and gives the insurer grounds to avoid the policy or reduce any future claim.

Do not apply for new life, critical illness, or income protection cover after a serious diagnosis without disclosing it to the insurer — doing so will typically mean any related claim is rejected. Speak to a regulated financial adviser before applying for any new cover.

Work-caused illness — a different disclosure route

The UK has no equivalent to New Zealand's Accident Compensation Corporation (ACC) — there is no no-fault compensation scheme that automatically covers illness or injury. The NHS provides treatment free of charge; compensation for illness or injury requires establishing fault or using personal insurance.

If your condition was caused or significantly contributed to by your work — asbestos-related diseases (mesothelioma, asbestosis, pleural plaques), occupational cancers, noise-induced hearing loss, vibration white finger, or similar — a different route applies. UK employers are legally required to hold employers' liability insurance under the Employers' Liability (Compulsory Insurance) Act 1969. If your illness is work-caused, you may have a civil claim against your employer (or their insurers), separate from any state benefits or personal insurance.

If this applies to you, contact a solicitor who specialises in occupational disease — many work on a conditional fee (no win, no fee) basis. Your trade union, if you are a member, can often provide legal support or referrals. You should also check whether Industrial Injuries Disablement Benefit (IIDB) applies to your condition — see the financial help guide for details.

Telling family

There is no legal framework governing disclosure to family members. Who you tell, when, and how much detail you share is entirely your decision.

Your GP, specialist, and NHS care team will not share information with family members — including your partner or next of kin — without your explicit consent. This is a fundamental principle of NHS confidentiality, grounded in UK GDPR and the Caldicott Principles that govern how health services handle patient information. If you want a family member to have access to your medical information, you can give consent to your care team; if you do not, the information stays confidential.

Some things worth thinking through:

• Who needs to know in order to practically help — getting to appointments, supporting you at home, managing finances? Telling those people early makes their help possible.
• Who will be directly affected by your illness — a partner, the parent of your children, someone who lives with you? They may need time to make their own adjustments.
• You can tell different people different amounts of information. Telling a colleague you're dealing with a health issue is different from telling a close friend the full picture.
• There is no obligation to tell anyone immediately. Many people choose to wait until they have a clearer picture — a second opinion, a treatment plan, a better understanding of what the diagnosis means in practice — before telling others. That is a reasonable choice.
• Once you tell someone, you cannot un-tell them. If you are not ready for a particular conversation, it is fine to wait.

Talking to children and young people

Children generally cope better with honest, age-appropriate information than with sensing that something is wrong at home without being told what it is. Research and clinical experience both suggest that children do better when they are included — at a level suited to their age and understanding — rather than shielded from information entirely.

What and how much to say depends on the child's age and developmental stage. Young children need simple, concrete language — "Mum/Dad is ill and is having treatment to get better" — rather than medical detail. Older children and teenagers can usually handle more information and often want it; trying to protect them by saying nothing often leaves them imagining something worse. Most children are reassured by being told that their daily routines — school, activities, meals — will continue as normally as possible even if things at home change.

Macmillan Cancer Support (0808 808 00 00) has detailed guidance specifically on talking to children about a parent's or family member's cancer diagnosis, including advice by age group. Their website also lists resources for children and young people directly affected.

YoungMinds (youngminds.org.uk) is the UK's leading children's mental health charity and has resources for young people dealing with a parent's serious illness, as well as guidance for parents on supporting their children's emotional wellbeing through a difficult time.

Consider informing your child's school so that teachers are aware and can offer additional support or simply be alert to changes in your child's behaviour. Schools have designated safeguarding leads and often school counsellors who can provide quiet, regular check-ins for a child going through a difficult period at home.

Your clinical nurse specialist, hospital social worker, or GP can advise on age-appropriate approaches and may be able to suggest local support services for children and families.

Your care team as a source of support

Two members of your NHS care team are particularly well placed to help with disclosure questions — not just the medical side, but the human side of deciding what to say and to whom.

• Clinical nurse specialist (CNS) or key worker — for most serious diagnoses, a CNS or named key worker is assigned as your main contact between appointments. They are experienced in supporting patients and families through disclosure conversations, can help you think through how to frame difficult information, and can sometimes be present at family meetings or conversations where a clinical voice is helpful. They can also advise on what information your GP or specialist is likely to share with family members, and with your consent can speak to family members directly.
• Hospital social worker — available at most NHS hospitals. Hospital social workers are skilled in supporting patients and families through practical and emotional complexity, including disclosure. They can facilitate family meetings, connect you with local support services, and help if family members are struggling to process what they've been told. Ask your care team or ward staff to refer you if you'd find this useful.

Both are bound by strict NHS confidentiality obligations and will not share information beyond your care team without your consent.

If you're not ready to tell anyone yet

Wanting time before telling people — including family — is a completely valid response to a diagnosis. You may need to absorb the information yourself before you can help others do the same, and that is not selfish or wrong.

Most practical steps can be taken without anyone else knowing. Benefits claims to DWP, insurance checks, bank hardship arrangements, Lasting Power of Attorney, and NHS treatment are all confidential. You can take financial and legal steps — applying for income support, checking your insurance, making a will, setting up an LPA — without family, friends, or your employer knowing unless you choose to tell them.

If you want to speak to someone confidentially before you decide who else to tell:

• Macmillan Cancer Support — 0808 808 00 00 (free, 7 days a week, 8am–8pm). For people affected by cancer; will not share your call with anyone.
• Samaritans — 116 123 (free, 24 hours a day, 365 days a year). For anyone in emotional distress, including around a diagnosis. Completely confidential.
• Mind — 0300 123 3393 or mind.org.uk. Mental health support and information for anyone struggling with anxiety, depression, or the emotional weight of a difficult situation.
• Your GP — a confidential starting point for both clinical and emotional support. Your GP can make a referral to NHS Talking Therapies (formerly IAPT) — free talking therapy for anxiety and depression, available by self-referral in most areas — or to a local counselling service. This is available to people dealing with the psychological impact of a serious diagnosis even before they have told anyone else.