The North West Thames Regional Genetics Service, previously known as the Kennedy-Galton Centre, offers genetic counselling and genetic diagnosis to individuals and families living in the area.

Telephone: 020 8869 2795

Location: North West Thames Regional Genetics Service, Level 8V, St. Mark's Hospital

Division: Integrated clinical service

About the service

The North West Thames Regional Genetics Service offers genetic counselling and genetic diagnosis to individuals and families living in the area.

We are likely to be your regional genetics centre if your GP surgery is located in:

  • Bedfordshire
  • Brent
  • Chelsea
  • Ealing
  • Edgware
  • Hammersmith
  • Harrow
  • Hertfordshire
  • Hillingdon
  • Hounslow
  • Kensington
  • Westminster.

We are based at Northwick Park and St Mark's Hospitals, but we also offer outreach clinics in different hospitals across the region.

If you are concerned about your health, the health of a family member, or your family history, you should first speak to your family doctor or GP. They may be able to answer your question, or they may refer you on to our service or another service that can help. 

If you are referred to our service, you will receive an appointment at one of our clinics.

Other services we provide

Where we provide your care

We hold clinics at several different hospitals across the region and will usually arrange to see people in the clinic closest to their home. Your appointment letter will state where the clinic will be held. 

If you live outside of the North West Thames area, you can find your local genetics service here.

Barnet General Hospital

  • Address: Wellhouse Lane, Barnet, Herts, EN5 3DJ
  • Telephone: 020 8216 4600 or 0845 111 4000
  • Genetics clinics:
    • Main outpatients (clinic 1, 2 or 3) on level one of the main building.
    • Children’s outpatients on level two of the main building

Bedford (Child Development Centre)

  • Address: Child Development Centre (CDC), Hill Rise, Kempton, MK42 7EB
  • Telephone: 01234 310278

Bedford Hospital

  • Address: Bedford Hospital, Kempston Road, Bedford, MK42 9DJ
  • Telephone: 01234 355122
  • Genetic clinics:
    • Paediatric outpatient department at the South Wing, Bedford Hospital.
    • Outpatient department, Breast Clinic

Charing Cross Hospital

  • Address: Fulham Palace Road, London, W6 8RF
  • Telephone: 020 3311 1234
  • Genetics clinics: main outpatients department, first floor, clinic block

Chelsea and Westminster Hospital

  • Address: 369 Fulham Road, London, SW10 9NH
  • Telephone: 020 8746 8000
  • Genetics clinics: paediatric outpatient department, ground floor

Ealing Hospital

  • Address: Ealing Hospital, Uxbridge Road, Southall Middlesex, UB1 3HW
  • Telephone: 0208 967 5000
  • Genetics clinics:
    • The main outpatients department
    • The antenatal department in the maternity wing

Hammersmith Hospital and Queen Charlotte's & Chelsea Hospital

  • Address: Du Cane Road, London, W12 0HS
  • Telephone:
    • Queen Charlotte’s Hospital: 020 3313 1111
    • Hammersmith Hospital : 020 3313 1000
  • Genetics clinics are held in the following locations:
    • The Centre for Fetal Care, second floor, Queen Charlotte’s Hospital
    • Paediatric outpatients, ground floor, D Block, Northside, Hammersmith Hospital
    • Cancer clinic, gynaecology outpatients, ground floor, Queen Charlotte’s Hospital
    • Main outpatient clinic in Hammersmith Hospital

Heart of Hounslow Polyclinic

  • Address: Heart of Hounslow, 92 Bath Road, Hounslow, Middlesex, TW3 3LN
  • Telephone: 020 8630 1425
  • Genetics clinics: Children’s Services, ground floor

Hemel Hempstead Hospital

  • Address: Hillfield Road, Hemel Hempstead, Herts, HP2 4AD
  • Telephone: 01442 213 141
  • Genetics clinics: antenatal clinic, maternity unit, level 2, Verulam wing

Hertford County Hospital

  • Address: Hertford County Hospital, North Road, Hertford, Herts, SG14 1LP
  • Telephone: 01707 328111
  • Genetics clinics: clinic A.  

Hillingdon Hospital

  • Address: Hillingdon Hospital, Pield Health Road, Uxbridge, UB8 3NN
  • Telephone: 01895 238282
  • Genetics clinics:
    • Paediatric Outpatient department, lower ground floor (Peter Pan and Wendy Wards)
    • Cumberlege Centre, third floor, main tower block

Lister Hospital

  • Address: Coreys Mill Lane, Stevenage, Hertfordshire, SG1 4AB
  • Telephone: 01438 314333
  • Genetic clinics:
    • Main outpatients, clinic F
    • Forster Suite, Level 10, Tower block

Luton and Dunstable Hospital

  • Address: Luton and Dunstable University Hospital, Lewsey Road, Luton LU4 0DZ
  • Telephone: 01582 49 11 66 
  • Genetics clinics: main outpatients and children’s outpatients, main hospital building.

Northwick Park Hospital (Kennedy Galton Centre)

  • Address: Northwick Park Hospital and St Mark’s Hospital, Watford Road, Harrow. HA1 3UJ
  • Telephone: 020 8864 3232
  • Genetics clinics are held in the following locations:
    • Kennedy Galton Centre, level 8, St Mark’s Hospital
    • Northwick Park: main outpatients
    • Chaucer Unit, level three, paediatric department

St Albans City Hospital

  • Address: Waverley Road, St Albans, Herts, AL3 5PN
  • Telephone: 01727 866 122
  • Genetics clinics: Breast Care Unit, ground floor, main building

St Mary’s Hospital

  • Address: Praed Street, London W2 1NY
  • Telephone: 020 3312 6666
  • Genetics clinics: paediatric outpatients, 6th floor, Queen Elizabeth the Queen Mother Building

Watford General Hospital

  • Address: Vicarage Road, Watford, Herts, WD18 0HB
  • Telephone: 01923 244 366 
  • Genetics clinics:
    • Fracture clinic
    • Children’s outpatients

West Middlesex Hospital

  • Address: Twickenham Road, Isleworth, Middlesex TW7 6AF
  • Telephone: 020 8560 2121  
  • Genetics clinics:
    • children’s outpatients, third floor, East Wing, main building

Joint colorectal cancer genetics clinics, outpatients department 4, ground floor, East Wing, main building

Screening options for Jewish genetic disorders

If you have one or more grandparents of Ashkenazi Jewish descent, you have two screening options:

Tay-Sachs carrier screening only

If you live in north west London, your GP can send an electronic referral (eRS) to our genetics service for a virtual or in-person appointment. If you or your partner are pregnant, the gestational age must be included in the referral. A genetic counsellor will then discuss and arrange your free Tay-Sachs disease carrier screening at Barnet Hospital. 

Screening for Tay-Sachs disease and other Jewish genetic conditions

If you'd like to be tested for 9 recessively inherited genetic conditions (including Tay-Sachs disease), you can book a screening session at Barnet Hospital for £250 without a referral from your GP. You will see a genetic counsellor at a virtual appointment who will then arrange the test using a saliva sample. This service is part-subsidised by the charity Jnetics.

How to make a referral

To make a referral:

  • GPs should use the electronic referral system (eRS)
  • all other specialists can email the team using a secure email

Urgent referrals should be clearly marked as urgent and referrals must include your patient's:

  • full name
  • address
  • date of birth
  • NHS number
  • GP details
  • reason for being referred to the genetics clinic.

Please include as much information as possible about the specific condition or suspected condition in the family. Sometimes another family member of your patient might have a confirmed genetic diagnosis. If this is the case, please include the following wherever possible:

  • a specific diagnosis 
  • relevant test reports
  • the exact biological relationship between the affected individual and the person being referred eg half-sister (same mother).

Excluded conditions

  • haemophilia - referral should be made to your local haemophilia unit
  • haemoglobinopathies - please refer to the Sickle Cell and Thalassaemia Centre at Central Middlesex Hospital
  • thrombophilia - referral should be made to your nearest thrombophilia clinic
  • MTHFR - GPs can arrange genetic testing for this directly, contact your local thrombophilia or artherosclerosis clinic for more information
  • familial hypercholesterolaemia - referral should be made to your local lipid clinic
  • alpha 1 antitrypsin deficiency - GPs can arrange genetic testing for this directly through the laboratory of their local hospital
  • haemochromatosis - GPs can arrange a haemochromatosis genetic test using this form

Referrals for women who are pregnant

If you are referring a woman who is pregnant, please:

Cancer genetic referral

If your patient meets our cancer genetic referral criteria:

We will then review the referral and we may request more information from the patient by asking them to complete the patient family history questionnaire

After assessing the full information we will either offer your patient an appointment or send them a letter containing appropriate screening advice.

Please let your patient know that it's important for us to confirm the family history, where possible, in order to determine eligibility. Unfortunately, this can cause delay especially if we don't have enough information at the beginning of the process.

If your patient or their family member has an identified genetic cancer susceptibility gene, we will accept a referral. We will need a copy of the genetic test report from the family member who has been tested.

If your patient's family does not have an identified genetic cancer susceptibility gene, then we usually only offer an appointment to someone who is affected. In some cases, where there is no affected relative available for testing, we would consider assessing an unaffected individual. The affected relatives must be blood relations, but can be through the maternal or the paternal side.

Please include any histology reports, such as receptor status or mismatch repair immunohistochemistry reports when completing the electronic referral. 

For more advice on a referral relating to cancer, please contact us:

Expedited genetic testing for breast or ovarian cancer

We offer expedited testing of high-risk breast and ovarian cancer associated genes, including BRCA1, BRCA2 and PALB2 for patients who:

  • meet the testing criteria
  • where expedited results would influence cancer management

To request expedited testing please complete the BRCA urgent referral form and email this to the team

Laboratory services for genetics

Our laboratory services are provided by North East Thames Regional Genetics Services, based at Great Ormond Street Hospital. You can contact them:

  • by phone: 
    • 020 7829 8870 
    • 020 7762 6888
  • by email.

More information about genetics

Information about genetics

  • Genetic Alliance UK: the national charity of over 130 patient organisations, supporting all those affected by genetic conditions. The website contains an introduction to genetics and genetic conditions and has many patient information leaflets.
  • Unique Rare Chomosome Disorder Support Group provides information and support to families and individuals affected by any rare chromosome disorder.
  • Contact a Family provides support, advice and information for families with disabled children, no matter what their condition or disability.
  • Antenatal Results and Choices (ARC) is a national charity which provides non-directive support and information to parents throughout the antenatal testing process.

Information if you're coming to our service because you have a family history of cancer

  • Macmillan provide practical, medical and financial support and push for better cancer care. 
  • Breast Cancer Care offers support and information to people affected by breast cancer. Specific information is available for people with a family history of breast cancer.
  • Beating Bowel Cancer raises awareness and provides support and information to anybody worried about or affected by bowel cancer.

Useful information for professionals

Genomics resources for healthcare professionals

The information on this page will assist health professionals in accessing the appropriate genetics resources needed for day-to-day patient care.

Genomic medicine can help improve diagnosis and care of patients and their families, and is relevant for all specialties. It is therefore important clinicians in all specialties to have access to training courses and have strong links with their regional genetics service:

North West Thames Regional Genetics Service

Telephone: 020 8869 2795
Address: Level 8V, St. Mark's Hospital, Watford Road, Harrow HA1 3UJ

Eligibility criteria for genetic testing

The NHS national genomic test directory can be found on the NHS England website This lists the eligibility criteria for all nationally commissioned genetic tests.

Laboratory links and test request forms

Genetic samples from most hospitals in the region are sent to the North Thames Genomic laboratory hub at Great Ormond Street Hospital, where test request forms are also available.

Genetic samples from Lister, Hertford County, Luton and Bedford Hospitals are sent to the Cambridge genomic lab where request forms are available.

Education resources

We appreciate each specialty and department has different needs and we are able to provide tailored education sessions. Please contact us to discuss your needs and make arrangements. 

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