Bariatric Surgery

Gastric Bypass & Gastric Sleeve Clinics

Private Bariatric Surgery in the UK
Gastric Sleeve & Gastric Bypass Clinics

Dedicated to treating our patients like people, Allure Weightloss facilitate gastric sleeve and gastric bypass surgeries in the United Kingdom. These two traditional methods of weight loss surgery are trusted by patients and healthcare professionals globally, changing people’s lives for the better, and reducing the comorbidities associated with obesity. Any bariatric surgery is distinctly different to a gastric balloon placement, the latter being a temporary weight loss device.

Bariatric Surgery with Allure

Bariatric surgeries hold the aim of reducing patient food consumption and encouraging weight loss by removing, limiting, or bypassing part of the stomach. The treatments we provide that fall under the umbrella term of bariatric surgery include the Sleeve Gastrectomy and Roux-en-Y Gastric Bypass. They are an option for those struggling with obesity and co-morbidities, having already attempted more traditional methods of weight loss. 

Alongside weight loss surgery, the patient will be supported to make the necessary dietary and lifestyle changes in order to properly maintain weight loss. This aftercare support will last up to 2 years. 

We have currently hold private surgeries in the North West, Midlands, and South East of England.

Bariatric Surgery should be carefully considered with all relevant information available. Our consultants and nurses can help. 

What is a Gastric Sleeve?

Typically performed laparoscopically (camera guided medical instruments are inserted through multiple small incisions in the upper abdomen), a sleeve gastrectomy involves removing a large part of the stomach in order to reduce it to about 15% – 20% of its original size. The result is a tube or sleeve-like structure. As you might expect, the purpose of the gastric sleeve is to limit the food intake of the individual post-procedure, and you should expect a recovery time of several weeks, with 1-2 weeks off work.

The expected weight loss from the sleeve gastrectomy is up to 60% of your excess weight over a period of 2-years.

gastric sleeve diagram showing full stomach and then stomach post-op which is reduced by 80%
roux-en-y gastric bypass, bariatric surgery diagram

What is a Gastric Bypass?

The Roux-en-Y Bypass, or gastric bypass surgery, involves creating a small pouch out of the stomach and attaching it straight to the small intestine, removing your ability to consume as much food. This process of bypassing a large part of the stomach is permanent and will require a lifestyle change, particularly around your diet, in order to support the process. This procedure is conducted to help patients lose weight and reduce the risk of life-threatening weight-related health problems such as heart disease, high blood pressure, and high cholesterol.

The expected excess weight loss from the Roux-en-Y Bypass is up to 70% over a 2 year period. With a recovery time of 6 – 8 weeks, you will need 2 – 3 weeks off work.

Why Choose Allure Weightloss?


Choice, in every aspect of our lives, is important, and seldom is choice more important than when it comes to our own health. By choosing private bariatric surgery with Allure, patients give themselves the opportunity to select a specialist Bariatric Consultant Surgeon at the clinic that best suits them. Patients will also ensure their procedure can be arranged by circumnavigating waiting lists, and qualify the level of aftercare that they will receive. At Allure, we put patients first, always.

The first step would be to speak with an Allure Patient Coordinator. Our team of specialists are well-equipped to help answer any questions, and it here you will arrange your initial consultation. From first contact to saying goodbye, we pride ourselves in our dedication to fantastic customer service and high-levels of satisfaction.

Smiling medical professional with blue stethoscope outside of clinic.

Private Bariatric Surgery Aftercare

The Allure Bariatric Surgery Aftercare Programme is complete with two years of contact with your surgeon, specialist Bariatric Nurses and HCPC Registered Dietitian. This team will ensure you receive the care you need following your surgery and provide expert advice regarding recovery, including any necessary and advisable longstanding dietary changes.

Bariatric Surgery Cost UK

As private medical weight loss specialists, we are dedicated to providing the highest levels of care possible. For your free quote, get in touch with our team today.

Allure Weight Loss Offices

Speak to a Specialist

Start your bespoke weight loss journey by speaking to our medical weight loss specialists about private bariatric surgery. Happy to help and provide preliminary advice, we look forward to hearing from you.

Meet Our Bariatric Consultant Surgeons

We only work with the highest-level bariatric consultants who perform our bariatric surgeries. They are all leaders in their field, so rest assured your consultant is at the top level. These include:

Mr Periyathambi Jambulingam
Mr Periyathambi Jambulingam
Mr Javed Sultan, consultant bariatric surgeon
Mr Javed Sultan
Allure Consultant Mr Brij Madhok
Mr Brij Madhok

Allure Weightloss Clinics

The Allure Clinics for Bariatric Surgery were hand selected for their dedication to quality patient care and outstanding facilities. You can learn more about our centres for Bariatric Surgery below by clicking on the respective image of each clinic.

Spire Bushey Bariatric Surgery and Orbera 12 Month Gastric Balloon Clinic


Heathbourne Road, Bushey
WD23 1RD
Weight Loss Surgery & Orbera Clinic

bariatric surgery in manchester, oaklands hospital


Oaklands Private Hospital, 12 Lancaster Road, Salford, M6 8AQ
Bypass, Sleeve

Entrance to Derby private health clinic. Light green wall, sign, and two plants.


Uttoxeter New Road
Derby, DE22 3NE
Bypass, Sleeve

Enquire Today
Ask About Private Bariatric Surgery with Allure Weightloss

Calculate Your BMI

How is body mass index (BMI) measured? 

An individuals BMI is calculated by using the following formula: 

BMI = Weight (kg) / Height (m)²

You must take your weight in kilograms, divide it by your height in meters, and then divide it a second time by your height in order to determine the correct body mass index. 

Not sure you qualify?

If you still aren’t sure, a member of our team will be able to help. If you are certain you won’t qualify for bariatric surgery, you may still be eligible for other medical weight loss treatments. 

BMI Requirements 

BMI Calculator
Use this Calculator to Check Your Body Mass Index (BMI).
Please enter a value between 125 and 225.
Please enter a value between 10.0 and 500.0 ( one decimal )
Calculate BMI
Use this calculator to check your body mass index (BMI), which can be useful in determining your eligibility for treatment.

Frequently Asked Questions

Am I Eligible for Bariatric Surgery?

You must have a minimum BMI of 35 or a BMI of 30 if you are struggling with existing comorbidities. Speak to our specialists for more information.

Is Bariatric Surgery Safe?

Bariatric surgery itself is considered one of the safest surgical procedures to perform, especially due to recent technological advancements in the field. 

How Much Weight can I Expect to Lose?

Typically, patients can look to lose around 65 - 70% of excess weight in the year after surgery. 

What is the Aftercare Programme?

The Allure Weightloss Bariatric Surgery Aftercare Programme is comprised of access to your consultant, bariatric nurse, and HCPC registered Dietitian for up to 2 years. 

Will I Put Weight Back On?

With help from our dietitians, you will work on implementing the necessary lifestyle changes to keep it off. 

What is a Gastric Sleeve?

A gastric sleeve, or sleeve gastrectomy, is the process of removing up to 80% of the stomach in order to limit food consumption and reduce hunger hormones. You can find out more here

What is a Gastric Bypass?

The Roux-en-Y Gastric Bypass involves creating a smaller 'pouch' from your stomach and attaching it straight to your intestines, bypassing the main body of your stomach. You can find out more here

What is Body Mass Index (BMI)?

The most widely used measurement for obesity. The BMI approximates body mass using a mathematical ratio of weight and height [(weight in kg ÷ height in meters) or (weight in pounds ÷ height in inches x 703)]. A BMI of 30 or more is regarded by most health agencies as the threshold for obesity. A BMI of 40 or more generally qualifies as morbid obesity. However, note that BMI measurements in body-builders and athletes may not be accurate determinants of obesity because the BMI does not distinguish between muscle and fat.

Potential Complications

The most common risks associated with bariatric surgery include:

  • Chronic nausea and vomiting
  • Acid reflux
  • Inability to eat certain foods
  • Obstruction of stomach
  • Anesthesia-related risks
  • Dilation of esophagus
  • Infection

**Please see individual bypass and sleeve pages for the specific complications associated with each procedure**