Bariatric Surgery

The bariatric service at the Whittington Hospital is known as the North London Obesity Surgery Service (or NLOSS). The Whittington Hospital has been providing bariatric surgery since 1998 and is one of the most established providers of such services in the UK.

At North London Obesity Surgery Service, we undertake gastric banding, Roux-en-Y bypass (gastric bypass) and sleeve gastrectomy. All operations are performed laparoscopically (keyhole surgery), which will help you to get up and around and back to normal as soon as possible after surgery.

At present we undertake up to six operations a week and will be performing greater numbers throughout 2010 as our service expands. One of the mainstays of the NLOSS is the multidisciplinary team. Each team member has his or her own role and all together we ensure you are fully informed about weight loss surgery and that your operation is performed in the safest possible environment. Your safety is our first priority.

The North London Obesity Surgery Service
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Range of services


• Gastric banding (LAGB)
• Roux-en-Y Gastric Bypass (LRYGB)
• Sleeve gastrectomy (LSG)
Medical (prior to surgery)

• Supervised dieting and medication
• Special diets e.g. Cambridge Diet, Slim fast, Whittington POLISH Diet
• Supervised physiotherapy
Psychological (prior to surgery)

• Eating Disorder Evaluation
• Self-help group for correction of eating disorder
• Cognitive behaviour therapy (CBT)
• Treatment of existing mental health issues such as depression and schizophrenia.


Outpatient consultations: Clinic 4B and 4A, Outpatient department, Whittington Hospital (unless informed otherwise).

For information on how to get to the hospital, please click here.

Some interventions may require travel to Central Middlesex Hospital or St Ann’s Hospital as a part of our joint service. Our patient support Group is currently held opposite the Whittington Hospital at the Archway Campus - Holborn Union Building Lecture Theatre.


Telephone: 0207 288 5226 (bariatric co-ordinator) or 0207 288 3408 (bariatric secretary)
(more contact information provided on right hand column)

Patient relation service

If you wish to make a compliment, complaint or suggestion about this service, please contact the Patient relations service via this link.


For information or help with an appointment made to this service, please contact the Appointments department on 020 7288 5511.