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22 years of experience
Hepatology, Irritable Bowel Syndrome (IBS), Pancreaticobiliary Medicine (Bile Ducts & Pancreas)

 Dr Vikram Sharma is a Consultant Hepatologist with an NHS practice at Royal London Hospital Barts Health NHS Trust, and a number of private practices in London which can be viewed on this website. Dr Sharma underwent training in gastroenterology and hepatology at the renowned North East Thames rotation, and also completed a PhD at University College London, researching ways of improving portal hypertension in cirrhosis of the liver. Dr Sharma has a special interest in treating patients with autoimmune disease of the liver and bile duct disease, although his daily clinical practice involves a wide range of liver disease including fatty liver disease, hepatitis, alcoholic liver disease, and liver cancer as well as general gastroenterology. He has an interest in research and his work has been published in a range of peer-reviewed academic journals. In addition, he has been involved in the running and establishment of a number of multicentre clinical trials. Away from the clinic, Dr Sharma enjoys social entrepreneurship projects and spending time with his young family.

Diseases, Medical Tests and Treatments
  • Upper GI Endoscopy
  • Flexible Sigmoidoscopy
  •  Abnormal Liver function
  • Fatty Liver disease
  • Viral Hepatitis
  • Cirrhosis of the liver
  • Portal Hypertension
  • Biliary Disease
  • Autoimmune disease of the liver
  • Liver cancer
  • Weight Loss
  • Jaundice
  • Alcohol-related liver and GI disease
  • Alcohol Detox
  • Viral Hepatitis
  • Liver cancer
  • General Gastroenterology
  • Flexible Sigmoidoscopy
  • Upper GI Endoscopy
  • Abdominal pain
  • Haemorrhoids
  • Piles


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Ear Nose & Throat Surgery (ENT)
Offers video consultation
Recommended by 1 specialist
21 years of experience
Adult Ear, Nose & Throat Surgery, Otology, Paediatric (Pediatric) Ear, Nose & Throat Surgery + 1more

Miss Nwaneka (Nneka) Eze is a Consultant ENT Surgeon who qualified in 1999 from Imperial College.

Miss Eze has experience in all aspects of ear, nose and throat conditions in both adults and children, with a specialist interest in conditions of the ear and hearing and paediatric ENT. She has two prestigious fellowships; firstly in Otology and hearing implants from Guy's and St Thomas' Hospital and secondly in Paediatric ENT from Great Ormond Children's Hospital.

Miss Eze has a keen research interest and was awarded an MD in Cochlear Micromechanics after spending 18 months working at Columbia University, New York. She speaks at international conferences and is involved in teaching. She also spent several months based at the ENT department in Zurich, Switzerland.

Diseases, Medical Tests and Treatments
  • Functional Nasal Surgery
  • Laryngoscopy
  • Microscopic Minimally Invasive Surgery Of The Vocal Cords
  • Pinnaplasty
  • Sinus Surgery
  • Tympanoplasty
  • Airway Reconstruction
  • Grommet Insertion
  • Laser Treatment For Nasal Blockage & Polyps
  • Stapedectomy
  • Balloon Sinuplasty
  • Functional Endoscopic Sinus Surgery (FESS)
  • Head And Neck Surgery
  • Mastoid Surgery
  • Otoplasty
  • Septoplasty
  • Stopping Nose Bleeds (Nasal Cautery)
  • Tonsillectomy
  • Vocal Fold/Laryngoscopy
  • Adenoidectomy
  • Acoustic Neuroma
  • Labyrinthitis
  • Nasal Blockage
  • Obstructive Sleep Apnoea (OSA)
  • Otosclerosis
  • Smell Disorders
  • Vestibular Neuritis
  • Eardrum Perforations
  • GORD (Gastroesophageal Reflux Disease)
  • Tonsillitis
  • Meniere’s Disease
  • Sinusitis
  • Swallowing Disorder (Dysphagia)
  • Voice Problems
  • Epistaxis (Nose Bleeding)
  • Noisy Breathing
  • Tonsil And Adenoid Infections
  • Complex Congenital Disorders
  • Hoarseness And Other Voice Disorders
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General Surgery
26 years of experience
Colorectal Surgery

Omar Faiz is the Clinical Director and a Consultant Colorectal Surgeon at St Mark's Hospital and Professor of Practice in Colorectal Surgery at Imperial College.

His areas of clinical interest within colorectal surgery are the surgical management of Inflammatory Bowel Disease (IBD), hereditary cancer syndromes, colorectal cancer and proctology.

He trained in General and colorectal Surgery within London and the South East of England and undertook specialist colorectal fellowships at St Mark’s Hospital and Valencia University Hospital prior to taking up a consultant post at Imperial College in 2008 (St Mary’s Campus) and then taking up a consultant position at St Mark’s hospital in 2012.


Professor Faiz has wide research interests and he has supervised 20 PhD and MD research fellows at Imperial College. His principal research interests include colorectal surgical epidemiology, health services research and surgical outcome research. He has authored 250 papers in peer-reviewed journals. He has also authored 11 book chapters and three text books.


Professor Faiz holds, or has held, various leadership positions at a national level. He is the ex-Chairman of the Association of Coloproctology of Great Britain and Ireland (ACPGBI) IBD subcommittee and Chair of the national Ileal Pouch Registry. He has contributed twice towards guideline development for the 'IBD Standards' and also NICE in 2015. Prof. Faiz has Chaired an international gastrointestinal surgery initiative of Global Comparators - a benchmarking and quality improvement group comprising sixty highly recognised worldwide academic hospitals (2014-2018).


He currently represents the ACPGBI on the Inflammatory Bowel Disease Standards board and is the Lead for IBD Surgery for the ACPGBI. He is currently on the Board of Surgical-European Crohn's and Colitis Organisation (S-ECCO) and is an Associate Editor for the journal Colorectal Disease.


In 2018 the Daily Mail published a Good Doctors Guide for IBD, compiled through clinical peer consensus, where Professor Faiz was listed and described as 'a very good, high volume surgeon at a major centre, supported by an excellent team.

Diseases, Medical Tests and Treatments
  • Laparoscopic Surgery
  • Colorectal Surgery
  • Anal Fissure Repair
  • Abdominal wall reconstruction
  • Closure of stoma
  • Colonoscopy
  • Diverticular disease
  • Fissure
  • Fistula
  • Flexible sigmoidoscopy
  • Haemorrhoid
  • Hernia (abdominal wall)
  • Inflammatory bowel disease
  • Proctology
  • Rectal cancer
  • Small bowel resection
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General Surgery
13 years of experience
Colorectal Surgery, Laparoscopic (Key-Hole) Surgery

Valerio Celentano is a Consultant Colorectal Surgeon in London.

He has a subspecialty interest in colorectal cancer and Inflammatory Bowel Disease (Crohn's disease and Ulcerative Colitis), particularly recurrent Crohn's disease and Ileoanal Pouch surgery. Mr Celentano has a specialist interest in surgical treatment of Deep Infiltrating Endometriosis. His clinical interest also include benign anorectal conditions (haemorrhoids, anal fissure, anal fistula surgery, pilonidal sinus) diagnostic and therapeutic colonoscopy.

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General Surgery
28 years of experience
Colorectal Surgery, Laparoscopic (Key-Hole) Surgery

Mr Atif Alvi is a leading Consultant General Surgeon specialising in Colorectal and Laparoscopic procedures with HCA Healthcare at the renowned Princess Grace Hospital. Additionally, he holds an NHS post at West Hertfordshire Hospital. He performs routine laparoscopic cholecystectomy, pilonidal surgery and hernia repairs and has a wide range of experience in dealing with colorectal cancers. Throughout his career, he has performed more than 400 open and 600 laparoscopic colorectal operations with good surgical and oncological outcomes compared to national standards. The talented surgeon has performed approximately 95% of his bowel cancer cases. 

After qualifying with a Medical Degree Mr Alif completed his higher surgical training in Cambridge and London. He was awarded a certificate of completion of training (CCT) in September 2010 after working in various specialities of surgery. During his training, he completed a Fellowship in Laparoscopic Colorectal Surgery was appointed a consultant post in 2011. He has worked across numerous centres of excellence including St. Marks Hospital and the Royal Marsden Hospital, gaining invaluable experience in advanced colorectal cancers, revision surgery and pelvic exenteration surgery. He promotes an enhanced recovery pathway in conjunction with a multidisciplinary team, aiming for an accelerated recovery and discharge home. 







Diseases, Medical Tests and Treatments
  • Cholecystectomy
  • Colorectal Surgery
  • Laparoscopic Surgery
  • Pilonidal Surgery
  • Irritable Bowel Surgery
  • Pelvic Externation Surgery
  • Hernia Repair
  • Colorectal Cancer
  • Colon Cancer
  • Bowel Cancer
  • Rectal Cancer
  • Hernia
  • Irritable Bowel Disease
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General Surgery
18 years of experience

Clinical Interests:

Mr Gregory Thomas is a Consultant Colorectal Surgeon. He qualified from Imperial College School of Medicine (St Mary Hospital) in 2003 with a distinction in surgery and an intercalated BSc from Imperial College, London. His basic surgery training was undertaken at St Mary Hospital and in the Northwest London region.

Mr Thomas received specialist general and colorectal training in Southwest London and Surrey. He undertook two years of research into pelvic floor disorders at St Mark Hospital (a world renowned hospital for bowel disorders) and was awarded a post-graduate research degree (MD) from Imperial College, London. He has maintained a strong ongoing research interest in this field. He has published over 40 peer reviewed papers and four text book chapters on pelvic floor and colorectal disorders. He has presented widely on these subjects at national and international meetings.

He was awarded a travelling fellowship from the Association of Coloproctology of Great Britain and Ireland in 2016, and has spent time at the world renowned Cleveland Clinic Hospitals in Florida and Ohio, and at the Centre Hospitalier Universitaire de Nantes, France. He received the FRCS from the Royal College of Surgeons of England in 2016. Prior to his appointment to Ashford and St Peter , Mr Thomas spent a further year at St Mark Hospital as a Resident Surgical Officer for higher post graduate training. He was previously a consultant colorectal surgeon at Ashford and St Peter's NHS Trust.

Mr Thomas areas of interest are:

Colorectal surgery, faecal incontinence, constipation, colonoscopy, groin hernia, incisional hernia, haemorrhoids, anal fissures, anal skin tags, diverticular disease and rectal prolapse

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

Miss Marianne Sampson has been a Consultant Upper Gastrointestinal and Bariatric surgeon since 2009. Having performed over 1,000 laparoscopic cholecystectomies and 500 laparoscopic hernia repairs, Miss Sampson is a specialist in laparoscopic (keyhole) surgery for gallstone and gastrointestinal reflux (GERD) disease and hernias, as well as weight loss surgery. She has a particular interest in gallbladder disease, laparoscopic hernia surgery, anti-reflux procedures and bariatric surgery. She has also developed an interest in revisional procedures and follow up programmes, for patients to maximise the benefit of their bariatric surgery. She is an experienced endoscopist and endoscopic trainer, offering a wide range of diagnostic and therapeutic endoscopic procedures.

Miss Sampson qualified from the University of Cambridge Medical School in 1996, undertaking her higher surgical training from 2002-2009 in the North East Thames region, including Barts and the London Trust, University College Hospital and Colchester hospital, during which time she did a fellowship at the National Cancer Centre, Tokyo as the recipient of the Cutlers Surgical Prize. She has been involved in developing the bariatric surgical services in Reading.

Diseases, Medical Tests and Treatments

  • Antireflux surgery
  • Bariatric surgery (for obesity)
  • Gall bladder surgery
  • Gastric bypass, gastric bands, balloons and sleeve gastrectomy
  • Laparoscopic and open hernia repairs (including complex abdominal wall hernias)
  • Revisional surgery
  • Upper gastrointestinal diagnostic and therapeutic endoscopy
  • Upper GI surgery
  • Video Consultation
  • Upper GI (Gastrointestinal) Surgery
  • Laparoscopic (Key-Hole) Surgery
  • Weight Loss & Bariatric Surgery
  • Gallbladder disease

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

Mr James Ramus qualified from St Mary's Hospital medical school (now Imperial College), London in 1997.

He was awarded an MBBS (1997) and BSc in Anthropology (1996). He underwent basic training in london until 2004 and then continued his higher surgical training in the Oxford region which he completed in 2010. During this time he was also awarded an MD in clinical research from University College, London for his work on Barrett's oesophagus and oesophageal cancer. He has published over 25 peer reviewed papers to date.

He was appointed as a consultant Upper GI and Bariatric surgeon at the Royal Berkshire Hospital, Reading in May 2012. Over the last 8 years he has helped develop the Bariatric surgical service into a regional/Level 1 centre performing over 200 Bariatric procedures a year. The unit started performing Robotic Bariatric surgery in 2017 and are currently the only unit in the UK who routinely perform this type of surgery.

Mr Ramus works together with 3 other UGI/Bariatric surgeons as part of Thames Valley General Surgery LTD (TVGS)- a private surgical consortium providing surgical services to the independent sector.

'Optimise weightloss' is part of TVGS and includes a full multi-disciplinary team specialising in all types of weight loss procedures including primary and revisional operations.

Diseases, Medical Tests and Treatments

  • Gall bladder surgery
  • Acid reflux surgery
  • Weight loss surgery
  • gastric bypass
  • sleeve gastrectomy
  • Gastric band
  • Robotic Bariatric surgery
  • Revisional Bariatric surgery
  • Endoscopic gastric balloon
  • Hernia surgery - laparoscopic and open
  • Revisional anti-reflux surgery
  • laparoscopic splenectomy
  • Upper GI endoscopy
  • Weight loss surgery
  • Robotic bariatric surgery
  • Revisional weight loss surgery
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