https://www.gosh.nhs.uk/wards-and-departments/wards/respiratory-sleep-unit/
Respiratory Sleep Unit - Alligator Ward
The Respiratory Sleep Unit is a five-bed care-by-parent unit specialising in the diagnosis and treatment of Sleep-Related Breathing Disorders in children.
Operational hours
Daytime
Monday to Friday - 8am to 5pm
Night-time
Monday to Sunday - 7.30pm to 8am
We are closed during the day on weekends, and weekdays 5pm to 7.30pm.
Please note, these operational hours (closed between 5pm to 7.30pm weekdays) also apply to our patients having two-night sleep studies (for example CPAP or BiPAP trial). If you have any queries regarding this, please do contact us.
Location
Alligator Ward, Respiratory Sleep Unit, Level 4 Premier Inn Clinical Building (PICB), Great Ormond Street Hospital for Children, Great Ormond Street, London, WC1N 3JH
Contact
Sleep Administrative Team and Bookings Department
Please contact if you need to book a date for your child’s sleep study, have questions about an upcoming sleep study or to cancel your sleep study
Contact number: 0207 762 6948
Respiratory Sleep Unit
If you have a specific question in regards to sleep study procedure, please talk to one of our friendly sleep physiologists who will endeavour to help you in any way possible.
Contact number: 0207 405 9200 (ext. 0462)
Non-invasive ventilation (NIV) team
If you have any questions, queries, concerns in regards to your child’s NIV, please phone the NIV team.
Contact number, Monday – Friday (8am to 5pm): 0207 405 9200 (ext. 8761/1726)
Out of hours: 0207 405 9200 (ext. 0462)
Who you will meet
The Respiratory Sleep Unit is staffed by Respiratory and Sleep Clinical Physiologists, specifically trained in the area of paediatric sleep medicine.
Prior to each sleep study, one of the respiratory registrars or an Advanced Nurse Practitioner (ANP) will visit each child to ensure an adequate history is taken, as well as checking that the child is generally in good health for the study to be performed.
You will be required to fill out a questionnaire about your child's sleep. You may be required to see either the sleep consultant or sleep fellow in the morning following your study.
Other members of the team include our Non-invasive Clinical Nurse Specialists (CNS), Play Specialist and Administration staff.
Meet the Respiratory Sleep Unit team
Consultants
- Dr Elaine Chan
- Dr Martin Samuels
- Dr Vasileios Patelis
Lead Clinical Physiologists
- Matthew Davies – Lead Sleep Physiologist (RPSGT)
- Ricky Damm – Chief Sleep Physiologist
- Aidan Laverty – Principal Clinical Physiologist (Lung Function & Sleep Units)
Administrative team
- Naushad Reza – Sleep Study Coordinator
- Niyaz Ahmed – Sleep Unit Coordinator
- Niraj Shah – Medical PA to Drs Chan, Samuels and Patelis
Senior Management
- Alissa Angelova Eynon-Freeman – Service Manager ‘Heart and Lung Division
- David Chatterton – General Manager ‘Heart and Lung Division
Conditions we treat
Conditions we observe in sleep studies
We provide overnight sleep studies for the evaluation and treatment of sleep disorders including:
Treatments we use
Initiation, support and follow-up of non-invasive ventilation (NIV) or supplemental oxygen:
Ward Information
Referral to the Sleep Unit
Great Ormond Street Hospital for Children NHS Foundation Trust (GOSH) provides a paediatric respiratory sleep service for providers commissioned by the North Central London Integrated Care Board (ICB).
Key Criteria (all must be met)
External Referrals
- The patient must be aged less than 16.5 years
- The referral must not come directly from a General Practitioner
The referrals must contain sufficient patient information or reason for request to allow the service to determine if the referral criteria have been met and for the correct allocation of resources to be determined.
Internal Referrals
- The patient must be aged less than 18 years
Referral Instructions
You may refer patients to our department via:
Internal referrals within GOSH:
- emailing our inbox sleeplab.respiratory@gosh.nhs.uk
- raising an order for a sleep study on Epic
Referrals external to GOSH:
- a letter (addressed to 'Dear Sleep Consultant' or to a specific sleep consultant) using the address listed on this page, with detailed information about the patient’s background, medical history and reason for referral to the Sleep Unit
- emailing GOSH referrals gos-tr.referrals@nhs.net
We do not accept referrals directly from families. If you think your child has a sleep problem which may benefit from referral to our service, you should discuss with your GP or doctor in the first instance.
Ref: 02026WAD0061
Last updated: February 2026