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General Enquiries: 01249 712232
Appointments: 01249 713019
Cancel Appointments: 01249 717030
Fax: 01249 701389

Out of Hours: 
NHS 111

Beechfield Road, Corsham, Wiltshire, SN13 9DL [Map]

Our Doctors


Dr Margaret Hatherell (F) MB BS London 1990 DRCOG MRCGP


Qualified at St George’s Hospital Medical School, London, in 1990. After working in hospitals in Bath and Swindon while training to be a GP, she joined The Porch as a part-time partner in 1996. She is the lead partner for several clinical areas and also for the Patient Participation Group and Carers. She takes a holistic approach to each patient and enjoys the variety of general practice.



Dr St.John Mohr (M) MB ChB Birmingham 1991 MRCGP


Qualified at Birmingham University Medical School in 1991. He remained in the Midlands for junior hospital jobs and to complete his GP training. He then temporarily left the NHS to work for the pharmaceutical industry in 2000 before returning to General Practice in 2004. He became a partner at the Porch Surgery in 2005. St.John is a full time partner at the Porch and is the practice IT, finance and prescribing lead and and enjoys minor surgery. 



Dr William Davies (M) MB BCh Cardiff 2004 MRCGP DCH


Qualified in 2004 at University of Wales College of Medicine, Cardiff. He worked in a variety of hospital posts in Wales and spent a year in New Zealand mainly working in paediatrics.  He commenced GP training in Bath in 2007 and spent time in hospital posts in rhematology, cardiology, gastroenterology, paediatrics, obstetrics,gynaecology and ENT.  He joined the Porch Surgery in 2009 as a GP registrar and remained there as as salaried GP.  He became a partner at the surgery in 2014.  He is now a GP trainer and oversees GPs in training.



Dr Joanna Swallow (F) MB BS London 2002 MRCGP DRCOG DFSRH DipMedEd


Qualified in 2002 at St Georges Medical School, London. She did house jobs in London and Chichester before working in Emergency medicine in Australia. On returning to the UK she moved to Bath and in 2004 undertook GP training posts in Psychiatry, Paediatrics, Gynaecology and ENT. She has worked as a GP in Bath and Wiltshire since 2007. Joanna works as a GP educator in Swindon and is involved in training future GPs. She finds the variety of General Practice interesting and within this particularly enjoys Family Planning, Education and Musculoskeletal Medicine. Having worked at the surgery as a salaried GP for several years she became a partner in 2017.



Dr Michelle Reade (F) MB BS Brisbane 1998 MRCGP DRCOG DFFP PG Cert Diabetes Care


Qualified in 1998 at the University of Queensland Medical School, Brisbane, Queensland, Australia.  She did her house jobs in Brisbane before working in Saudi Arabia for 18 months in Obstetrics and Gynaecology.  On her return to the UK she undertook GP training posts in Accident and Emergency, Obstetrics and Gynaecology, ENT, Community Paediatrics and Genitourinary Medicine and was a a GP registrar in Wiltshire.  Since 2008 she has worked as a GP in Wiltshire, Bath and Surrey.  She joined the Porch Surgery as a GP partner in 2017.  She enjoys all aspects of General Practice, but particularly enjoys Diabetes, Gynaecology, Family Planning and Sexual Health.



Dr Elizabeth Watson (F) MB BCh Cardiff 2004 MRCGP


Qualified at the University of Wales in 2004 and worked at several hospitals in South Wales before heading to Australia for a year working in Accident and Emergency. She returned to the UK in 2007 to join the Bath GP training scheme and rotated through specialities including Oncology, Cardiology, ENT, Gynaecology and Paediatrics. She worked in Somerset for five years and joined the Porch Surgery in 2015. She enjoys all aspects of General Practice, in particular Gynaecology and Palliative Care.




Dr Catherine Bennett (F) MB BS London 2004 BSc MRCGP DFSRH DRCOG


Qualified at University College Medical School, London in 2004. After house jobs she worked in A&E in Perth, Western Australia then returned to the UK to do a further 6 months A&E in Newham, East London. She started her GP training in South London in 2007 during which she spent time in Cardiology, Paediatrics, ENT, Palliative care and Sexual health. She worked as a GP in West Sussex for six years before relocating to Wiltshire and started at the Porch in January 2017. She also currently works for the West of England Academic Health Science Network with Wiltshire CCG working on finding evidence for commissioning decisions. Particular interests include ENT, Contraception and Sexual Health.



Dr Celia Pilmer (F) MB ChB Leeds 2006 MRCGP FRACGP  


Qualified at Leeds in 2006 then completed her two years foundation training in West Yorkshire undertaking a variety of specialities. She then went on to do her GP Training in Leeds with training posts in A&E, Elderly Medicine, ENT and General Practice. After qualifying as a GP in 2009 she moved to London and spent four years working in a busy inner city GP practice before moving to Australia to spend two years working as a GP in Sydney.  She moved back to the UK in 2018 and joined the Porch Surgery as a salaried GP.  She enjoys the diversity of General Practice and her interests include Women's Health and Dermatology.


Dr Charles Berrisford (M) BSc MB BS London 1991 DCH DFFP DRCOG MRCGP


Qualified at Charing Cross and Westminster, London in 1991. He was a GP partner at Number 18 Surgery in Bath for twenty-three years before joining the Porch Surgery as a salaried doctor in 2018. His clinical interests include palliative care and paediatrics. He is married with two children and, when not in the surgery, enjoys classical music and singing.



Dr Carla Jefferies (F) MB ChB Bristol 2010 MRCGP


Qualified at the University of Bristol in 2010. After qualifying she completed her two years foundation training in Gloucester and Bath. She joined the Bath GP training scheme in 2012 where she spent time in hospital posts in ENT, A&E, Obstetrics and Gynaecology. She worked as a GP Registrar at the Porch Surgery between 2014 and 2019 before becoming a GP Retainer from May 2019. 



Dr Susannah Worsley (F) MB ChB Sheffield 2011 MRCGP


Qualified at the University of Sheffield in 2011. She completed her 2 years of Foundation Training in South Yorkshire, before spending a year working on an elderly care ward and volunteering in Malawi. She moved to Bath in 2014 to join the GP training program, completing posts in A&E, Obstetrics and Gynaecology and Paediatrics. She has worked at the Porch since 2017, initially as a GP Registrar and has been a GP Retainer since January 2020.


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