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26 years of experience
Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease

Professor Ailsa Hart is a Consultant Gastroenterologist and Director of St Mark’s Hospital Inflammatory Bowel Disease Research. She is Sub-Dean of St Mark’s Hospital Academic Institute, Honorary Senior Clinical Lecturer at Imperial College and Chair of the British Society of Gastroenterology Gut Microbiota for Health Group.

Professor Hart qualified with honours from Oxford University in 1992 and was awarded the George Pickering Prize for Medicine and Surgery Proxime Accessit in 1995 for extraordinary achievements. She trained in Gastroenterology and General Internal Medicine in London and Amsterdam. She obtained her PhD from Imperial College in 2005 and become a Fellow of the Royal College of Physicians in 2013. 

Professor Hart has expertise in all aspects of gastroenterology. She has a particular clinical interest in inflammatory bowel disease (IBD) - ulcerative colitis and Chron's disease. 

Professor Hart is actively involved in research with a particular focus on intestinal immunology and bacteriology (role and modulation of the microbiome). She has co-authored two books and more than 130 peer-reviewed papers and book chapters. She regularly presents at national and international conferences. 


Diseases, Medical Tests and Treatments
  • Upper GI endoscopy
  • Gastroscopy
  • Colonoscopy
  • Flexible sigmoidoscopy
  • Inflammatory bowel disease
  • Ulcerative colitis
  • Chron's disease
  • Functional bowel disease
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General Surgery
Offers video consultation
31 years of experience
Laparoscopic (Key-Hole) Surgery, Upper GI (Gastrointestinal) Surgery

Mr Shaun Preston is a General Surgeon based in Guildford. His private practice is based at The Nuffield Health Hospital in Guildford. He also practices at Mount Alvernia Hospital, Guildford (Private) and is Head of the Oesophago-Gastric Unit at The Royal Surrey NHS Foundation Trust Hospital. He specialises in Upper GI surgery, laparoscopic (keyhole) surgery and endoscopy. His areas of interest include the management of reflux, Barrett’s oesophagus, oesophageal and gastric cancer, hernia repair, management of gallstones, robotic surgery, and interventional endoscopy including endoscopic ultrasound.

Mr Preston attained Bachelor of Science (BSc(Hons), 1987), Bachelor of Medicine (MB, 1990), Bachelor of Surgery (ChB, 1990) degrees and a Doctor of Medicine (MD, 1997) from Leeds University. He is also a Fellow of the Royal College of Surgeons of England and was awarded his Fellowship (FRCS(Eng)) in 1996. His Intercollegiate Fellowship in General Surgery (Upper GI) (FRCS(Gen)) was awarded in 2000, where he was also honoured with the ASGBI Gold Medal &

Prize for the best results across the UK and outstanding performance in the viva voce examinations.

Mr Preston was also awarded the prestigious Japanese Foundation for the Promotion of Cancer Research / British Council Fellowship at the National Cancer Center Hospital, Tokyo (2001) where he worked in the Gastric, Oesophageal &

Endoscopic Divisions. He also was a Visiting Surgeon at the Division of Foregut Surgery, University of Pittsburgh Medical Center (2006). He has an international reputation, lectures widely and demonstrates surgical technique around the world. In 2015 he was the Distinguished Visiting Lecturer at the Royal College of Surgeons of Australia Annual Scientific Meeting.

He is a member of many professional bodies and has also been a Council Member of the Association of Upper Gastrointestinal Surgeons (AUGIS) and the Association of Laparoscopic Surgeons of Great Britain, International

Hepato-Pancreato-Biliary Association and Ireland (ALSGBI).

His is Senior Visiting Fellow at the University of Surrey. His research interests are in the evaluation and optimal management of patients with oesophageal and gastric cancer. His is National Chief Investigator for one

NCRI portfolio study (NeoAEGIS) and Principal Investigator on another (OCCAMS). He has clinical interests in Enhanced Recovery (ERAS), Standardised Clinical Pathways and Prehabilitation ahead of surgery (Prehab).

Diseases, Medical Tests and Treatments

  • Upper GI Surgery
  • Fundoplication / Anti-reflux Surgery
  • Giant (Paraoesophageal) Hiatus Hernia Repair
  • GastroIntestinal Stromal Tumour (GIST) Surgery
  • Laparoscopic Transgastric Surgery
  • Diaphragmatic Hernia Repair
  • Upper GI Endoscopy (OGD)
  • Barrett's Oesophagus Surveillance
  • Laparoscopic Common Bile Duct Exploration
  • Incisional Hernia Repair
  • Umbilical Hernia Repair
  • Ventral Hernia Repair
  • Component Separation Repair for Large Incisional Hernia

Anti-reflux surgery


Swallowing problems (Dysphagia)

Giant paraoesophageal hernia repair

GastroIntestinal Stromal Tumour (GIST) surgery

Endoscopic Ultrasound

Enhanced Recovery

Open Hernia Repair

Laparoscopic Hernia Repair

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Dr Azhar Ansari

Dr Azhar Ansari

1.80 miles

Dr Azhar Ansari

1.80 miles
33 years of experience
General (Internal) Medicine, Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease, Irritable Bowel Syndrome (IBS)

Dr Ansari is a Consultant Gastroenterologist who specialises in Crohn's Disease, who works at the HCA The Shard.

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15 years of experience
Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease, Irritable Bowel Syndrome (IBS)

Dr Sheena Mankodi is a Consultant Gastroenterologist and Physician at The Whittington Hospital where she is clinical lead for gastroenterology and lead for the capsule endoscopy service.  She qualified with distinction from Guy’s, King’s and St Thomas’ Medical School in 2006 with an MBBS degree and a first class honours degree in physiology (BSc).  She completed her post graduate training in North East London and is on the GMC Specialist Register, accredited in both Gastroenterology and General (Internal) Medicine.

Areas of interest

Capsule Endoscopy (Pillcam); Endoscopy; Oesophagogastroduodenoscopy (also known as gastroscopy or OGD); colonoscopy; flexible sigmoidoscopy.                                        

Upper GI symptoms; swallowing problems; heartburn; reflux; indigestion; acidity.       

Lower GI symptoms; diarrhoea; constipation; bleeding.                                                     

General GI symptoms; pain; bloating; unintentional weight loss.                                

Anaemia; GI causes of anaemia; iron deficiency anaemia.

Specific diseases; irritable bowel syndrome (IBS); inflammatory bowel disease (IBD); ulcerative colitis; Crohn's disease; alcohol-related diseases; coeliac disease.

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General Surgery
19 years of experience
Colorectal Surgery, Laparoscopic (Key-Hole) Surgery, Upper GI (Gastrointestinal) Surgery

Mr Suliman completed his higher surgical training at the North East Thames rotation through University College, the Royal Free and the Royal London Hospitals. He then completed three fellowships in Sydney, the Royal Marsden and the Royal London Hospitals before taking his consultant post at the Royal Free London, Barnet and Chase Farm Hospitals NHS Trust.

He is a Consultant Colorectal and General Surgeon with a specialist interest in minimally invasive surgery. His practice includes colorectal cancer, inflammatory bowel disease and proctology as well as elective and emergency general surgery.

His research at University College London and the Babraham Institute in Cambridge focused on novel ways in bowel cancer screening and was published which presented his findings.

Clinically, he chairs the colorectal cancer MDT and has a special interest in minimally invasive laparoscopic and robotic surgery. His colorectal fellowships in laparoscopic, robotic, pelvic floor and exenterative surgery have served to bring this experience to his clinical practice.

Locally, he is the governance and audit lead and takes pleasure in fulfilling management duties. He is an examiner at UCL Medical School and enjoys teaching junior surgeons.

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Dr Kwok Tang

Dr Kwok Tang

2.31 miles

Dr Kwok Tang

2.31 miles
Offers video consultation
30 years of experience
Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease, Irritable Bowel Syndrome (IBS), Pancreaticobiliary Medicine (Bile Ducts & Pancreas)

Dr Kwok Tang qualified at the University of Edinburgh Medical School, with subsequent broad postgraduate gastroenterology and hepatology specialist training in London at Guy's & St Thomas' Hospital and University College Hospital. He completed training at the Institute of Liver Studies, King's College Hospital.

He pursued sub-specialty training in advanced endoscopy/colonoscopy and ERCP as Assistant Professor at the Chinese University of Hong Kong (1998-1999), and now provides a comprehensive diagnostic and therapeutic endoscopy/ERCP service. He is Educational and Clinical Trainee Supervisor in general gastroenterology, and JAG-accredited endoscopy trainer. He is examiner for UCL/RFH Final MB and CMT interviewer at London Deanery.

Dr Tang spent a further period of extended research at the Institute of Hepatology, University College London (2000-2003), completing his MD thesis in hepatitis/liver disease immunopathogenesis, presenting and publishing widely in this field. He was appointed Consultant Gastroenterologist/Hepatologist in 2005 at Royal Free London NHS FT, Barnet and Chase Farm Hospitals.

Dr Tang’s areas of special interest include endoscopy/colonoscopy, ERCP, liver disease, pancreatobiliary disorders, irritable bowel syndrome, colitis, abdominal pain and screening for bowel cancer. He has a large NHS and private practice devoted to the management of these conditions and general Gastroenterology.

Diseases, Medical Tests and Treatments

  • Bowel cancer screening
  • ERCP
  • Endoscopy
  • Colonoscopy 
  • Fibroscan 
  • Liver disease/abnormal liver tests
  • Irritable bowel syndrome 
  • Abdominal pain/bloating
  • Colitis 
  • Rectal bleeding
  • Bowel cancer screening 
  • Pancreatobiliary disorders
  • Change in bowel habit
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Recommended by 15 specialists
19 years of experience
Irritable Bowel Syndrome (IBS), General (Internal) Medicine, Inflammatory Bowel Diseases (IBD) such as ulcerative Colitis or Crohn's Disease

Dr Samred Sami is a leading Consultant Gastroenterologist based at University College London (UCL) Hospitals NHS Trust, as well as an Honorary Associate Professor at UCL. The UCL Faculty of Medical Sciences is ranked #1 in London for Medicine and #10 in the world. The UCL Faculty of Medical Sciences is ranked as 10th in the world, and 1st in the UK.

Dr Sami obtained his medical degree in 2003 from the University of Baghdad, Iraq. Following this, he undertook specialty training in both the UK and the USA, at a number of centres of excellence. This included an advanced gastroenterology fellowship at the Mayo Clinic in Rochester, Minnesota which was recently ranked as the #1 hospital in the world! which has been ranked, for the sixth consecutive year, as the No. 1 "Best Hospital" nationwide by the U.S. News & World Report in its 2021-2022 "Best Hospitals" rankings. Dr Sami was also awarded a PhD from the University of Nottingham, through the completion of a National Endoscopy Research Fellowship. Following successful completion of a Post Graduate Certificate in Medical Education, he has taken up numerous educational roles, teaching both undergraduate and postgraduate students. What's more, he has also served as a faculty member and speaker on multiple national and international workshops and teaching courses.

Dr Sami is the founder and director of Digestive Health UK, a collaborative group of expert doctors and leaders specialising in gastroenterology and its related specialties. Based in central London, the mission of Digestive Health UK is to offer a holistic, multidisciplinary approach to patients’ care and empower patients through education. 

When it comes to research, education and clinical care for patients, Dr Sami holds an exemplary track record. As a result of this, he has been rewarded with several distinguished awards, including the Trainees Out of Programme Award from the British Society of Gastroenterology (BSG), the Cook Medical Marsha Dreyer Award from the American Society for GI Endoscopy (ASGE) and, more recently, a Fellows-in-Training award from the American College of Gastroenterology (ACG). He has also widely published in the field of gastoenterology, as the author and co-author of over 40 publications and research abstracts, which includes the current UK guidelines on oesophageal dilatation.

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Recommended by 4 specialists
22 years of experience
Irritable Bowel Syndrome (IBS), Neuro-Gastroenterology

Dr Rami Sweis is a highly experienced Consultant Gastroenterologist and specialist in endoscopy, with a particularly keen interest in managing complex benign and malignant upper gastrointestinal disorders. Dr Sweis is based at University College London (UCL) Hospital, where he is the Upper GI Physiology Lead, and carries out private consultations at The London Gastroenterology Centre on Welbeck Street.

Thanks to many years of comprehensive training and experience, Dr Sweis has extensive expertise in treating a wide range of conditions, including reflux disease (such as heartburn and regurgitation), swallowing problems (dysphagia), oesophagal problems, stomach problems, constipation, diarrhoea and endoscopic treatments. At the UCLH Upper GI Physiology Unit, Dr Sweis manages patients with the latest techniques, technologies and therapies. His repertoire for endoscopic treatment encompasses a range of techniques, including stent insertion, dilatation, laser, radiofrequency ablation, endoscopic mucosal resection and dissection.

Outside of his clinical practice, Dr Sweis is passionate about educating others in gastroenterology and has organised several Upper GI symposia and hands-on Upper GI physiology workshops on a national and international scale. He is also a clinical representative of the Association of GI Physiologists (AGIP) Committee of the British Society of Gastroenterology and a core member of the International High Resolution Manometry Working Group and the Neurogastroenterology & Motility (NGM) Committee.

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General Surgery
Offers video consultation
Recommended by 1 specialist
35 years of experience
Colorectal Surgery, Laparoscopic (Key-Hole) Surgery

London-based Consultant General, Colorectal and Laparoscopic Surgeon, Mr Stephen Warren, is a highly experienced clinician with specialist interest in all kinds of abdominal and bowel complaints. Performing surgical operations since 1987, Mr Warren is extremely highly skilled in a wide variety of surgical operations, including both elective (planned) and emergency procedures. Mr Warren is primarily based at BMI The Kings Oak Private Hospital in Enfield, London. His key specialist ares of interest include groin complaints, gallstones, bowel cancers, rectal bleeding, abdominal pain, irritable bowel syndrome (IBS) and colonoscopy.

In 1986, Mr Warren graduated with a medical degree from the University of London. Finding that patients experienced less pain and recovered more quickly with fewer complications in comparison to traditional, more invasive methods, he soon established a passion for laparoscopic surgery. In 1991, as a young consultant, Mr Warren performed his first of many laparoscopic cholecystectomy, which awarded a national scholarship to undertake 3 month sabbatical and gain experience at the Cleveland Clinic, a consistently top ranked hospital in the USA and leading centre for research, education and health information. After publishing his thesis, he also achieved a Master of Surgery degree from the University of London.

Mr Warren is also a dedicated teacher, trainer and mentor. Outside of work, he enjoys oil painting, playing football and cycling.

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General Surgery
Offers video consultation
Recommended by 2 specialists
18 years of experience
Weight Loss & Bariatric Surgery, Laparoscopic (Key-Hole) Surgery, Upper GI (Gastrointestinal) Surgery

Mr. Greg Jones is an Upper Gastrointestinal Surgeon with a specialist interest in weight loss surgery, gallbladder surgery and hernia surgery, currently working in the Thames Valley region and central London. His current NHS post is at the Royal Berkshire NHS Foundation Trust, Reading. His private general surgery work is provided as part of Thames Valley General Surgery (, a group of specilaists providing surgical care throughout Berkshire, Oxfordshire, Buckinghamshire and surrounding areas. Greg offers private bariatric surgery with the experienced multi-disciplinary weight loss team of Optimise Weight loss ( His areas of clinical interest include robotic and laparoscopic weight loss surgery, minimally invasive surgery for gallstones, hernias and heartburn, and enhanced recovery after surgery

Mr. Jones qualified in Medicine from Imperial College London in 2003. He became a Fellow of the Royal College of Surgeons of England (FRCS) in 2012 before becoming a consultant in UGI and Bariatric surgery in 2015. He has had specialist Upper GI and Bariatric surgery training at St Thomas’ hospital, London; Oxford University Hospital; Monash Medical Centre, Melbourne, Australia. He has also visited and undertaken fruther Bariatric Surgery training in the Netherlands and France. 

Greg prides himself on listening to the individual needs of pateints and finding the best treatment path for them whether or not this involves surgery. 

Diseases, Medical Tests and Treatments

  • Laparoscopic (Key-Hole) Surgery
  • Upper GI (Gastrointestinal) Surgery
  • Weight Loss & Bariatric Surgery
  • Gastroscopy
  • Endoscopy
  • Hernia repair (key-hole)
  • Gastric By-pass
  • Weight Loss Surgery
  • Video Consultation
  • Hernia
  • Gallbladder disease
  • Weight Gain
  • Weight Loss

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