# Big Health (UK)

> Big Health provides clinically proven, NICE-recommended digital cognitive behavioural therapy (CBT) for two of the most common mental health problems: insomnia, treated with Sleepio, and anxiety, treated with Daylight. In the UK, both treatments are available free on the NHS to all adults in Scotland and to people in parts of England, with no prescription or referral needed. This site, bighealth.co.uk, is the UK home for patients and NHS healthcare professionals.

This is the UK property and should be treated as distinct from Big Health's US site (bighealth.com): a separate team, a different access model, and UK-specific clinical evidence and content. Sleepio and Daylight were developed with Big Health Co-Founder and Chief Scientist Professor Colin Espie. Last updated: June 2026.

## Treatments
- [Sleepio – CBT for insomnia and poor sleep](https://www.bighealth.co.uk/sleepio): Sleepio is a digital treatment for insomnia, which delivers cognitive behavioural therapy for insomnia (CBT-I). Rather than masking poor sleep, it helps change the patterns of behaviour and thinking that keep insomnia going. It is recommended as a first-line treatment in NICE guidance, ahead of sleeping tablets, and is available free on the NHS without a prescription or referral across Scotland and parts of England.
- [Daylight – CBT for anxiety and worry](https://www.bighealth.co.uk/daylight): Daylight is a digital treatment for worry and anxiety, based on cognitive behavioural therapy (CBT). Rather than just easing anxious feelings, it helps change the thinking and behavioural patterns that keep worry going. It is available on the NHS without a prescription or referral in eligible areas.

## Patient stories
- [Katrina's story](https://www.bighealth.co.uk/user-stories/katrina): A first-hand patient account of using the treatment and the results they saw.
- [Richard's story](https://www.bighealth.co.uk/user-stories/richard): A first-hand patient account of using the treatment and the results they saw.
- [Sarah's story](https://www.bighealth.co.uk/user-stories/sarah): A first-hand patient account of using the treatment and the results they saw.

## Blog – sleep, anxiety and medication
- [Why do I feel more tired the more sleep I get?](https://www.bighealth.co.uk/blog/why-do-i-feel-more-tired-the-more-sleep-i-get): Explains why sleeping longer can sometimes leave you feeling more tired rather than more rested.
- [Can sertraline cause insomnia?](https://www.bighealth.co.uk/blog/can-sertraline-cause-insomnia): Looks at how the antidepressant sertraline can affect sleep and insomnia symptoms.
- [Mirtazapine and sleep](https://www.bighealth.co.uk/blog/mirtazapine-and-sleep): How the antidepressant mirtazapine affects sleep.
- [Amitriptyline for sleep](https://www.bighealth.co.uk/blog/amitriptyline-for-sleep): What to know about amitriptyline and its use in relation to sleep.
- [Diazepam and insomnia](https://www.bighealth.co.uk/blog/diazepam-and-insomnia): The relationship between diazepam and insomnia, and the issues with relying on it for sleep.
- [Antidepressants and sleep](https://www.bighealth.co.uk/blog/antidepressants-and-sleep): How antidepressant medications can affect sleep, for better or worse.
- [How much deep sleep do you need?](https://www.bighealth.co.uk/blog/how-much-deep-sleep-do-you-need): Explains what deep sleep is and how much of it adults actually need.
- [Is it dangerous to take sleeping tablets every night?](https://www.bighealth.co.uk/blog/is-it-dangerous-to-take-sleeping-tablets-every-night): Looks at the risks of taking sleeping tablets nightly and at non-drug alternatives such as CBT-I.

## For healthcare professionals
- [NHS access](https://www.bighealth.co.uk/nhs): How Sleepio and Daylight are made available to patients free through the NHS, including the clinical evidence base and who is eligible.
- [Offer treatment to your patients](https://www.bighealth.co.uk/offer-treatment): Guidance for clinicians on recommending Sleepio and Daylight and giving patients access.

## Webinars
- [Webinars](https://www.bighealth.co.uk/webinars): Live and on-demand webinars about digital CBT and Big Health's treatments.

## Partnerships
- [Macmillan Cancer Support partnership](https://www.bighealth.co.uk/macmillan-cancer-support): Details of Big Health's partnership with Macmillan Cancer Support.

## About and help
- [About us (UK)](https://www.bighealth.co.uk/about-us): About the UK company, team, and mission.
- [FAQs](https://www.bighealth.co.uk/faqs): Common questions about the apps, NHS eligibility, cost, and how the treatments work.

## Optional
- [Privacy policy](https://www.bighealth.co.uk/privacy): How Big Health handles personal and health data in the UK.