The Lindo Wing, St Mary’s Hospital,
Praed Street, London W2 1NY


Professor Sanjay Purkayastha - BSc (Hons), MBBS (Hons), MD, FRCS (Eng)

Consultant Surgeon - NHS Weight-loss (Bariatric) Surgeon

General Surgery, Laparoscopic Surgery, Bariatric Surgery, Upper GI Surgery, Trauma Surgery

Sanjay Purkayastha is a Consultant General Surgeon with a specialist interest in Bariatric & Upper GI Surgery. He was also an associate professor at Imperial College London. He is currently an honorary professor at Brunel University.

Professor Purkayastha trained at Saint Mary's hospital and medical school, Imperial College London, the London deanery, and the Royal College of Surgeons England. During his training he also spent time at Cook County Hospital, the Cleveland Clinic and the Mayo Clinic in the USA.

His research interests are varied and include surgical education especially digital mobile technologies, clinical research in Bariatric and Metabolic Surgery, assessing the health of healthcare organisations, single port laparoscopic surgery and surgical evidence synthesis.

He has a busy general surgery practice both for elective (planned) surgery and emergencies which include working as a trauma surgeon in one on London's busiest Major Trauma Centres at St. Mary's Hospital, Paddington, London. He was also one of the first surgeons in the UK to carry out robotic Bariatric surgery.

He is one of four surgeons at the Imperial Weight Centre, which is a Tier 3 and Tier 4 service for weight loss management and surgery for obesity. He routinely carries out gastric bands, sleeve gastrectomies and gastric bypasses all laparoscopically (key hole surgery).

Professor Purkayastha provides all his Bariatric data to the NBSR (National Bariatric Surgery Registry) as he is a believer of transparency of results and outcome/volume based surgery ensuring the safest and best results for patients.

His general surgery practice includes laparoscopic surgery for hernias of all kinds, gall bladder surgery and anti-reflux surgery (surgery for treatment of severe heartburn) as well as emergency surgery work outside trauma that includes management of conditions such as appendicitis, gallstones, pancreatitis, bowel obstruction, hernia emergencies and the management of many other conditions that present with abdominal pain.

His NHS practice is at St. Mary's Hospital, Praed Street, London and he also sees patients there privately on request in the Lindo Wing where Prince George was born in 2013 and Princess Charlotte born in 2015.

Dr Alex Wickham

Alex Wickham is a Consultant Anaesthetist at Imperial College Healthcare NHS Trust, working at St Mary’s and Hammersmith Hospitals. His regularly provides anaesthesia for patients having major trauma, vascular, upper gastrointestinal, general and gynaecological surgery. He delivers a pre-assessment clinic for vascular patients, working with them to optimise their complex medical conditions ahead of major surgery.

He passed his undergraduate medical degree with distinction and subsequently trained in the Imperial School of Anaesthesia in London, gaining experience at multiple renowned hospitals. He is a happy ‘generalist’, proficient in all aspects of anaesthetic practice. He particularly enjoys managing the perioperative care of people with complex metabolic conditions such as diabetes and older patients.

He runs the Imperial Trauma Team Member course, is an Advanced Life Support Instructor and teaches on the Imperial Human Factors Course, aiming to improve how teams’ function in the clinical environment. He collaborates in multicentre quality improvement and research projects aiming to improve both patient safety and experience. He is an educational supervisor for trainee anaesthetists, supervises medical student projects, has published work in peer reviewed journals and has also authored several book chapters.

Dr Pete Williamson

Peter Williamson works at Imperial College Healthcare NHS Trust as a Consultant Anaesthetist, splitting his time between St Mary's, Hammersmith & The Western Eye Hospitals.

He provides anaesthetics on regular lists covering upper gastrointestinal, orthopaedic, obstetric and ophthalmic surgery, and has clinical interests in both enhanced recovery for major surgery and sedation for challenging cases.

He has been based in and around the region since 2000, attending Imperial School of Medicine as an undergraduate, Imperial School of Anaesthesia as a postgraduate, and being appointed as a consultant at Imperial in 2015.

Peter has a keen interest in education, holding a post-graduate certificate in the area, and is an examiner at the Royal College of Anaesthetists. Outside of work, he enjoys sports & uses his anaesthetic knowledge to keep his aquarium fish happy.

Dr Samantha Scholtz - MBChB, MRCPsych, Dip (CBT), PhD

Consultant Psychiatrist.

Dr. Scholtz is a consultant psychiatrist who is specialises in the management of obesity related disorders and the preparation of patients for bariatric surgery, based at the Imperial Weight Centre, St Mary's Hospital. She graduated from Stellenbosch University and completed her higher specialist training at St. George's University of London.

She has expertise in the management of eating disorders and obesity, and has worked within 3 different national referral centres in this field. She is an expert at providing psychiatric assessment and support to patients undergoing bariatric surgery, having assessed and guided over 2000 patients through this process. She has trained in various psychotherapeutic approaches and uses cognitive behavioural or cognitive analytical approach in preparing patients when required.

Her PhD, funded by the Welcome Trust Charity examined appetite and food reward changes in patients who have undergone bariatric surgery using functional magnetic resonance imaging, and her work has been published in peer-reviewed journals.

Dr Louis John Koizia

Dr Louis John Koizia graduated from Imperial College London and trained in general internal and geriatric medicine in North-West Thames. His clinical work involves embedded care and optimisation of patients undergoing surgery. By effectively addressing medical needs and complexity alongside acute surgical issues he can help to provide comprehensive holistic care, prevent complications, optimise outcomes, and give patients the best chance of making a successful recovery.

Dr Harvinder Chahal - BMedSci, MBBS, MRCP, PhD.

Dr Harvinder Chahal is a Consultant in Diabetes, Endocrinology and Bariatric Medicine at Imperial College Healthcare NHS Trust and Honorary Clinical Senior Lecturer at Imperial College, London. He qualified from St Bartholomew's and the Royal London School of Medicine in 2001. He trained in diabetes and endocrinology at St Bartholomew's Hospital.In 2007 he was awarded the prestigious Medical Research Council training fellowship to undertake research in the field of endocrinology resulting in several influential research papers in high impact journals.

He has been awarded several national and international prizes for his research and clinical work. He has written several textbook chapters. He is the Lead Bariatric Physician specialising in managing patients prior to and after bariatric surgery and pharmacotherapy to reduce their complication risks and optimise the health benefits of weight loss. He also leads the tier 3 weight management programme for patients that would like to pursue non-surgical treatment for obesity.

Dr Simon Peake

MBBS(Hons), BSc(Hons), MRCP, MD

Dr Simon Peake is a consultant gastroenterologist at Imperial College Healthcare NHS Trust and an Honorary Clinical Senior Lecturer at Imperial College, London. He qualified from St Mary's Hospital medical school, London with honours and distinction and was also awarded a BSc degree with first class honours.

Dr Peake continued his medical training at several London hospitals during which time he has undertaken specialist fellowships in inflammatory bowel disease and advanced endoscopy at St Marks Hospital. He has undertaken postgraduate research in endoscopy and immunology, investigating the impact of novel therapeutic agents in the treatment of Crohn's disease.

He has extensively published in the fields of inflammatory bowel disease and endoscopy as well as writing several book chapters and peer reviewing articles for high impact gastroenterological journals.

Since his appointment as a Consultant Gastroenterologist at St Mary's Hospital, Dr Peake has taken on the roles of both unit and endoscopy training lead for the hospital as well as the lead physician for inflammatory bowel disease. In addition, he has active roles within Imperial College, both as a member of the college admission interview panel and as an examiner for undergraduate examinations.

Jessica Upton

Nutrition is a fundamental piece of everyday life, as without it, we fail to function. My passion is to support, motivate and educate clients to enable self-empowerment, successful behavioural changes, and ultimately optimal lifestyle adaptations. We are too often faced with a media minefield of mixed dietary messages, meaning it can be hard to understand what dietary advice to follow. My aim is to provide uncomplicated and evidence-based advice, which is adapted to meet client specific goals.

MediAccounts – Billing on behalf of Professor Sanjay Purkayastha

Dr Saira Hameed - Consultant Endocrinologist

Dr Saira Hameed is a Consultant Endocrinologist. She works within the Imperial Weight Centre, a world-class centre of excellence for weight management and within the Imperial Centre for Endocrinology which has an international reputation for clinical and academic excellence in endocrinology.

Dr Hameed completed her pre-clinical medical training at Oxford University, graduating with First Class Honours.

Dr Hameed went on to clinical medical training in London, winning numerous prizes for outstanding academic achievement. In 2001, as a senior medical student, Dr Hameed was selected for a highly competitive Visiting Medical Student Clerkship in Endocrinology at the Mayo Clinic in the United States. She qualified in 2002, with multiple distinctions and prizes for exceptional performance and as one of the highest ranked medical students in the whole of the University of London, Dr Hameed was named proxime accessit to the University of London Gold Medal.

Dr Hameed completed her early postgraduate training in several major London teaching hospitals before embarking on a prestigious Medical Research Council (MRC) Clinical Research Training Fellowship during which time she undertook a PhD at Imperial College London. Through her PhD research Dr Hameed discovered how one of the brain’s hormone systems controls appetite and body weight, a scientific advance that was reported in the national media.

On completion of her PhD, she was appointed to an NIHR Clinical Lectureship in Endocrinology at Imperial College London, a postdoctoral award that provides clinical and academic training for doctors who show outstanding potential for continuing a career in academic medicine. During her time as a Clinical Lecturer, Dr Hameed developed a sub-specialist interest in weight management and designed and trialled the novel and highly effective SatPro Weight Management Programme.

Dr Hameed is the author of The Sunday Times Bestseller, The Full Diet and the accompanying The Full Diet Cookbook, both of which were Number One Amazon Bestsellers.

Dr Hameed’s areas of specialist practice are: Endocrinology, Diabetes, Weight Management, Bariatric Medicine, Medical care before and after bariatric (weight-loss) surgery, General Internal Medicine

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