Free Weight Loss Consultation on Harley Street – Call us on 0800 3134618

Weight Loss Surgery


We work at several locations in London including on Harley Street, at the heart of London’s prestigious medical district

Healthier Weight at the heart of London's medical district

We’re proud to work with some of the world’s best bariatric specialists in the centre of London’s prestigious medical district. Here on Harley Street, we work with one of the pioneers of the gastric sleeve, Mr John Loy. 

Weight Loss Procedures in London


"Before surgery I felt like I was constantly judged"

Martine’s gastric sleeve was life changing. After losing an incredible 16 stone she can now indulge in her life’s passions, particularly horse riding which she was unable to do while overweight.

Weight loss consultants in London

John Loy

Mr John Loy


Mr Loy is a new member of the Healthier Weight surgical team and an experienced Consultant Upper GI and Bariatric Surgeon. He has been trained to Royal College of Surgeon’s Fellowship level in Bariatric Surgery and spent a year in the world renowned NYU Langone Medical Centre with Professors George and Christine Fielding. He operates a busy full-time NHS weight loss surgery practice, receiving tertiary referrals for primary and complex revisional surgery.

Services and procedures offered

Gastric bypassGastric sleeve

Timeline and qualifications

  • Completed medical school and basic surgical training in Belfast in 2002
  • Higher surgical training in Severn Deanery, specialising in upper GI and bariatric surgery
  • Expert laparoscopic bariatric training in Bristol, Gloucester, Truro and Taunton as a specialist registrar 
  • Consolidated training through a Royal College of Surgeons fellowship in the Southwest Bariatric Surgery Centre of Excellence in Taunton
  • Recently spent a year in New York with Professors George and Christine Fielding at the internationally renowned NYU Langone Bariatric Surgery Unit – one of the busiest bariatric units in the world
gastric sleeve surgery

Mr Periyathambi Jambulingam

qualifications: MBBS, MS, FRCS Ed, FRCS (Gen Surg)

Mr Jambulingam qualified in 1991 and completed his higher surgical training in the West Midlands, including his certificate of completion of specialist training (CCST) at the Queen Elizabeth Hospital, Birmingham. Now with extensive bariatric surgery training and experience, Mr Jambulingam has been the Consultant General Surgeon (with special interest in upper GI/laparoscopic surgery) at Luton and Dunstable Hospital NHS Trust since 2007.

Services and procedures offered

Gastric sleeveGastric bypassRevision surgery

Current positions and memberships

  • Consultant GI / Laparoscopic & Bariatric Surgeon at the Luton and Dunstable Hospital NHS Foundation Trust 
  • Member of the British Obesity & Metabolic Surgical Society (BOMSS)
  • Member of International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO)
  • Member of British Obesity Surgery Patient Association (BOSPA)
  • Association of Surgeons of India (AUGIS)
  • Faculty of Surgical Trainers (Royal College of Surgeons, Edinburgh)

"I am in my family now, whereas I was just on the sidelines before"

Just 1 year after her gastric sleeve surgery, Sarah has lost 7 stone. “Now, after dinner we’ll walk up the park as a family. I fit in a swing! We have races to see who can go the fastest. I am in my family now, whereas I was just on the sidelines before.”

Meet your London aftercare team


Jo Whitehouse

Specialist Bariatric Nurse

Jo joined Healthier Weight in 2014 having qualified in 1996 at the University of Wolverhampton gaining a Diploma of Higher Education in Nursing Studies.

Jo has gained almost 21 years’ experience in caring for surgical patients within a wide range of specialities both in the private and National Health sectors. Jo has been specialising in bariatric surgery since 2011.

Yasmin Sarfraz

Senior Bariatric Nurse Practitioner

Yasmin joined Healthier Weight in 2011 having qualified in 2010. Yasmin qualified at Birmingham City University gaining distinction in the Adult Nursing Diploma.

Throughout her nursing career, Yasmin has gained experience in many areas of speciality, including intensive care, cardiac medicine and military trauma. Yasmin has been specialising in bariatric surgery since 2011.

Our locations in London

Harley Street Clinic in London

10 Harley Street

10 Harley Street, London, W1G 9PF

In the heart of London’s medical district, our prestigious Harley Street clinic offers a very high standard of patient care for Healthier Weight patients. Consultations will be carried out by world-renowned surgeon Mr John Loy.

Parking: Short-term meter parking on the street. 15% discount available from reception for car park on Cavendish Square.

Directions: Click here

BMI Independent Hospital in London

BMI London Independent Hospital

1 Beaumont Square, Stepney Green, London E1 4NL

Mr John Loy is our specialist at BMI London Independent Hospital in central London. Consultations and a range of weight loss procedures are available at this location.

Parking: Pay and Display opposite hospital.

Directions: Click here

Spire Bushy Hospital

Spire Bushey Hospital

Bushey, Watford, Hertfordshire, WD23 1RD

Just over 5 miles away from Watford city centre and with easy access of the M1 and M25 motorways. The Spire Bushey Hospital in Watfordoffers a convenient location on the outskirts of London. 

Parking: FREE parking on site

Directions: Click here

Get a FREE consultation by calling
0800 3134618 
Get a quote 
We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Your personal data will be used for the personalization of ads and cookies may be used for personalized and non-personalized advertising. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit “Cookie Settings” to provide a controlled consent.  Read our cookies policy here