Medical specialists – Top Doctors UK
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Professional statement

Dr Nick Walsh is a leading consultant liaison psychiatrist based in London who specialises in depression, PTSD and anxiety disorders, including OCD. With particular expertise in LBTQ+ mental health, he is also a specialist in brain injury, somatic symptom disorders, mental health conditions associated with chronic physical conditions, and neurodiversity disorders, such as adult ADHD and adult autism. Dr Walsh, who is part of the renowned London International Patient Services (LIPS) group, currently sees private patients at Priory Wellbeing Centre Harley Street and Priory Hospital Hayes Grove.

Dr Walsh originally qualified from the University of Manchester, obtaining both his medicine degree and a BSc in History of Medicine. After successfully completing his foundation programme, he began his psychiatry training in Manchester before relocating to London, where he continued his postgraduate training on the prestigious Royal London and St Bartholomew’s scheme. In 2014, Dr Walsh became a consultant in general adult psychiatry with a sub-specialist certification in liaison psychiatry, and took up a consultant post in east London, including at two of the UK’s most prominent teaching hospitals: St Bartholomew’s Hospital and the Royal London Hospital, the busiest major trauma centre in Europe.

With a holistic approach to psychiatric care, Dr Walsh’s practice is based on the understanding of each patient’s unique needs and considerations, offering a range of traditional and complementary techniques, including medication, talking therapies, nutrition, exercise and practices such as meditation and mindfulness. Building a rapport with every patient he meets, Dr Walsh identifies key challenges, aspirations and goals in one’s life to develop a tailored and highly personalised treatment that will enable recovery.

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Mr Christopher Chandler is one of London's most highly-experienced neurosurgeons. He holds expertise in a wide range of areas, including brain tumours, hydrocephalus, paediatric neurosurgery, brain metastasis, epilepsy surgery and intracranial endoscopy.

His professional journey began with a physiology degree, succeeded by a medical degree from the University of London in 1986. He underwent comprehensive rotational training in neurosurgery across various prestigious institutions, including a fellowship in epilepsy surgery at Kings College Hospital. He currently practises at a number of reputable private clinics including the London Neurosurgery Partnership for which he is a founder member and previously worked in the NHS, practising at King's College Hospital (KCH).

He previously lead the paediatric and adolescent neurosurgical service at KCH and forms an integral part of the regional adult brain and spinal cord tumour service, which covers South East London, Kent and East Sussex, making it the largest brain tumour service in the UK.

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Dr Raisa Kumaga is a leading counselling psychologist based in London. Her areas of expertise include work stress, post-traumatic stress disorder (PTSD), anxiety, depression, low self-esteem, and bipolar disorder. She is the founder of the renowned The Fern Psychology and also consults privately at Change of Harley Street.

Dr Kumaga commenced her professional career as a social worker in the Netherlands before relocating to the UK and qualifying as a chartered psychologist. She has extensive experience in child, adolescent, and adult mental health services, alongside third-sector organisations, and is a senior counselling psychologist at South London and Maudsley NHS Foundation Trust.

Dr Kumaga holds a Professional Doctorate in Counselling Psychology from the University of East London, as well as postgraduate certification in eye movement desensitisation and reprocessing (EMDR) therapy. Additionally, she also holds a Master of Philosophy and Education from the University of Cambridge and a Bachelor of social work with Summa Cum Laude from The Hague University of Applied Services.

As an integrated practitioner, Dr Kumaga employs a variety of therapeutic modalities to meet and support the needs of her patients. Her approach is rooted in compassion and a commitment to personal growth, drawing from psychodynamic, attachment-based, cognitive-behavioural, acceptance and commitment, as well as dialectical behaviour, compassion-focused, and EMDR therapies to achieve greater wellbeing.

HCPC Number: PYL042189

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Mr Aadil Khan is a highly respected and experienced consultant plastic surgeon. His specialist interests include, but are not limited to, breast reconstruction and augmentation, lymphoedema, body contouring, microsurgery, and many kinds of skin cancer. Presently, Mr Khan practises at three private clinics within London, where he consults with patients, performs procedures, and takes on leadership roles.

Mr Khan graduated from Oxford University in 2002, receiving his primary medical qualification. He later furthered his specialty training within the London Deanery. More so, his education and training continued at prestigious institutions such as Harvard University and The Institute of Cancer Research, London, where he received a Master's and PhD. Mr Khan joined The Royal College of Surgeons in 2017 with as a fellow in plastic surgery. However, during his training years, he undertook fellowships in both reconstructive and aesthetic medicine, as well as microsurgery. These fellowships were completed at Sidney-Kimmel Cancer Center, Johns Hopkins Hospital, USA, and The Royal Marsden Hospital, London.

Holding several leadership roles in his field, Mr Khan is an exemplary doctor for patients, colleagues, future doctors, and future patients. He is dedicated to medical education as a current associate honorary faculty at The Institute of Cancer Research in addition to a faculty of aesthetic medicine at University College London. Mr Khan is on multiple boards with fellow doctors to ensure the best quality of care for patients.

Mr Khan maintains a passion in research, and he currently focuses on topics such as breast implant capsule biology (including capsular contracture and breast implant-associated anaplastic large cell lymphoma (BIA-ALCL), as well as the clinical evaluation of surgery for lymphoedema. Some of the newer, more cutting-edge technologies that Mr Khan works with consist of indocyanine green (ICG) guided surgery for microsurgical reconstruction, vascularised lymph node transfer (VLNT), and lymphaticovenous anastomosis (LVA).

Due to his research and efforts, Mr Khan has been widely published and has papers in peer-reviewed journals. Most notable, he has co-authored two publications regarding COVID-19 for cancer and breast reconstruction patients. The publication studying the antibody response for cancer patients after the COVID vaccination has been extensively used internationally to help warn and aid at-risk groups.

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Dr Mirka Slavska is an obstetrics and gynaecology consultant and a BMS-accredited menopause specialist, with over 15 years of experience, who aims to provide evidence-based holistic care. Her focus is on supporting, educating, and empowering women to understand treatment options for optimised health, quality of life, and happiness. Her areas of expertise include the menopause, the perimenopause, fibroids, menstrual disorders, heavy periods, and hormone replacement therapy (HRT).

Trained in Wales, Dr Slavska developed a passion for managing non-cancerous gynaecological problems and obtained an advanced certificate in the management of benign gynaecological conditions. She believes perimenopausal and postmenopausal health is of prime importance. Dr Slavska advises on complex perimenopausal and menopausal issues, and prescribes HRT, having accomplished an Advanced Menopause Specialist certification with the British Menopause Society. To support her clinical practice, Dr Slavska obtained an Ultrasound Assessment Proficiency Certificate from the Royal College of Obstetricians and Gynaecologists. To be able to provide well-rounded care for women, she also acquired a Diploma in Family Planning and Sexual Health.

Within Dr Slavska's NHS organisation, she holds the role of simulation education lead for Gynaecology. Co-founder of the GEMS (Gynaecological Emergencies Multidisciplinary Simulation) training, Dr Slavska is accredited by the Association for Simulation Practice in Healthcare and an author of MRCOG exam revision books, as well as a registered trainer for early pregnancy and benign gynaecological disease modules. Dr Slavska won the Welsh award for the Trainer of The Year in 2023.

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Mr Piero Nastro is an extremely well-regarded, highly skilled general and colorectal surgeon who specialises in performing laparoscopic surgery and endoscopies, colorectal surgery, and complex abdominal wall surgery, and possesses a high level of expertise in conditions such as colorectal cancer, haemorrhoids, fistula, rectal bleeding, and abdominal wall hernias, amongst many others.

In 2015, he was appointed as a consultant surgeon at Darent Valley NHS Hospital and Queen Mary NHS Hospital. He currently holds a number of posts in private hospitals including The Blackheath Hospital, The Nuffield Health at St Bartholomew's Hospital and The Private Clinic of Harley Street in London. He moved from Italy to the UK in 2002 to pursue further higher surgical training, and in 2003, he completed a fellowship in colorectal surgery at the University of Hull.

In 2014, he completed his higher surgical training in General and Colorectal Surgery in London/South East England undertaking a post-training Fellowship in Colorectal Surgery at the esteemed St Mark’s Hospital in London. With over 20 years of post-graduate training, Mr Nastro has gained extensive experience in most fields of general surgery, but most specifically, in his special interest of laparoscopic surgery, colorectal surgery, advanced proctology and complex abdominal wall hernias.

An JAG accredited endoscopist, Mr Nastro has a keen interest in innovative techniques for colorectal, minimally invasive surgery, complex hernia surgery and proctology. Impressively, Mr Nastro boasts the ability and expertise when it comes to performing the Rafaelo® procedure as an effective minimally invasive treatment option for the treatment of internal haemorrhoids.

Thus far in his career, he has published an extensive amount of peer-reviewed articles some of them on high impact factor journals such as the British Journal of Surgery, Archieve of Surgery and Technique in Coloproctology. You can some of his articles here on ResearchGate.  Mr Nastro has also published over 70 abstracts on the abstract book of several international and national meetings such as the Association of Coloproctology of GB&I (ACPGBI), the European Society of Coloproctology (ESCP), The Association of Surgeons of GB&I (ASGBI) and The Italian Society of Colorectal Surgery (SICCR).

Mr Nastro is also the representative of the Association of Coloproctology of GB&I (South East Chapter), Surgical Area Coordinator of the Italian Medical Society of Great Britain, Surgical College Tutor (Royal College of Surgeons) and undergraduate surgical lead (Kings College University and Kent and Medway Medical School) at Darent Valley Hospital.

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Dr Nikolay Kralimarkov is a seasoned consultant forensic psychiatrist with extensive expertise across multiple domains of psychiatry, including forensic, general adult, and liaison psychiatry. He practises at VAL Clinic and specialises in anxiety, depression, eating disorders, bipolar disorder, schizophrenia, and psychotic disorders. 

With over 15 years of in-depth experience in diverse healthcare environments both within the UK and internationally, he has honed his skills in the assessment, diagnosis, and management of mental health disorders, particularly in secure and high-risk settings. Presently, he is a consultant forensic psychiatrist at Southern Health NHS Foundation Trust, where he leads multidisciplinary teams in crafting care pathways for mentally disordered offenders.

His responsibilities include offering expert psychiatric consultation, overseeing patient care, and conducting forensic evaluations in both low and medium secure units as well as local prisons. Dr Kralimarkov's career has provided him with a wealth of experience in general adult psychiatry, liaison psychiatry, and prison psychiatry. He has contributed to various NHS Trusts, delivering psychiatric services in settings ranging from acute inpatient units to community-based crisis resolution and home treatment teams.

His work is characterised by a strong commitment to public safety, patient recovery, and the delivery of high-quality, evidence-based care. Academically, he holds a MD, which he obtained from the Higher Institute I. P. Pavlov in Bulgaria, along with a master's degree in Public Health and Health Management, and a MBA from the City University of Seattle. 

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Dr Neil Hobson is a leading consultant cardiologist based at the Spire Hull and East Riding Hospital. His areas of expertise lie in treating palpitations, atrial fibrillation, shortness of breath, heart failure, chest pain and unexplained blackouts and falls.

Dr Hobson underwent specialist cardiology training in Sheffield. After researching the use of stress echocardiography in assessing the haemodynamic profiles of native and prosthetic heart valves, he produced original research publications in this area and achieved his medical degree in 2005. He also continued his training in the field of interventional electrophysiology and obtained his fellowship at The Royal Prince Alfred Hospital in Sydney, Australia. Whilst there, he was trained extensively in the management of cardiac arrhythmias.

Dr Hobson currently practices at Spire Hull and East Riding Hospital and provides electrophysiological ablation of cardiac arrhythmias and atrial fibrillation ablations to a regional population of over 1 million. He is also committed to screening patients with a family history of sudden cardiac death (SCD) and routinely offers treatment to those considered at high risk with the implantation of cardiac pacemakers. Furthermore, he has a clinical interest in treating patients with heart failure using pioneering biventricular pacemakers.

Dr Hobson was one of the very few cardiologists to receive a certificate of accreditation from the British Society of Echocardiography, which recognised his practical and theoretical understanding of cardiac echocardiography.

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Ms Charlotte Chaliha is a leading obstetrician and gynaecologist in London. She graduated in physiological sciences from St Anne's College, Oxford, and in medicine from Selwyn College, Cambridge. She had dual accreditation in obstetrics and gynaecology as well as higher sub-specialist training in urogynaecology and a fellowship in uro-neurology.

Ms Chaliha's area of expertise lies in postpartum pelvic floor problems, postpartum perineal trauma such as anal sphincter damage, vaginal prolapse, bladder pain, recurrent urinary tract infections and urinary incontinence.

Her MD thesis was based on the: "Risk factors and causes of trauma to the pelvic floor during childbirth." She has a particular expertise in this area and has developed a specialist clinic for at the Royal London Hospital for women with childbirth-related problems such as urinary or faecal incontinence and perineal pain.

In 2007 she was appointed as a consultant obstetrician and gynaecologist with a special interest in pelvic floor disorders at The Royal London Hospital. She has been lead urogynaecologist since 2013 for Barts Health NHS Trust and is the lead gynaecologist at the Royal London Hospital.

Ms Chaliha has authored numerous chapters and publications covering all aspects of pelvic floor investigation, surgery and pelvic floor damage related to childbirth. She has extensive obstetrics experience in high risk obstetrics and covers both NHS and private births. She has co-authoured the popular pregnancy book " the Contented Pregnancy" with the popular author Gina Ford.

Ms Chaliha co-leads one of only two nationally accredited pelvic floor services in the UK, integrating the management of bowel, bladder and pelvic floor dysfunction. Her expertise in this clinic is in the management of pelvic floor prolapse, constipation, urinary and faecal incontinence.

Ms Chaliha provides expert evidence for the courts in England and Wales on behalf of claimants and defendants in personal injury and clinical negligence actions. She has obtained the Bond Solon Cardiff University Expert Witness Certificate and completes around 50 medico-legal reports per year.

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Mr Yousri Afifi is a highly experienced consultant obstetrician and gynaecologist with over 25 years of expertise in advanced laparoscopic and reproductive surgeries. He practises at The Harborne Hospital. 

Holding a PhD from the University of Birmingham, he has undergone extensive specialised training in minimally invasive techniques. As the director of the Birmingham Endometriosis Centre and the lead consultant for the reproductive surgery unit at Birmingham Women’s Hospital, Mr Afifi is a leading authority in his field. He is widely recognised for managing complex cases of endometriosis, infertility, fibroids, recurrent miscarriages, and ovarian disorders, receiving referrals from across the region and nation.

A pioneer in the field, Mr Afifi introduced the technique of ovarian tissue autografting for patients undergoing ovary removal surgeries. This innovative procedure allows the reversal of menopause without the need for artificial hormone replacement, providing a natural and highly successful alternative that has received excellent patient feedback.

His work has also paved the way for advancements in ovarian tissue freezing. In addition to his clinical practice, Mr Afifi plays a significant role in medical education as the chair of advanced training at the West Midlands School. He is one of a select few nationally approved trainers in advanced laparoscopic surgery.

His contributions to surgical innovation include the development of a new technique for safely managing corneal ectopic pregnancies and a refined method for laparoscopic entry that reduces the risk of injury. Mr Afifi’s expertise is widely recognided, with his work being featured in six book chapters and over 20 scientific publications. He has been an invited speaker at more than 50 national and international conferences and serves as the director of eight international courses, where he provides hands-on training in various surgical skills. His contributions have made significant impacts in both the clinical and academic realms of laparoscopic and reproductive surgery.

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