Members of the team are:

Dr Christopher Holdridge (m)

GP Partner

I qualified in medicine from King’s College London 2010. I Achieved MRCGP 2015. The summer of 2015. I joined Elm/Cator Practice, right after completing GP training. My main areas of interest are joint and soft tissue injections and minor surgery. I am involved in running minor surgery clinics, steroid injections in normal clinic appointments, responsibility for the Patient Participation Group and Information Governance. Prior to studying medicine I gained a degree in English Literature from Durham University and worked briefly in the media.


Dr Jiten Kalyan (m)

GP Partner

I qualified as a doctor from the Universidad Technologica de Santiago ( UTESA, Dominican Republic) in 1999. I have experience in various surgical specialities (General Surgery, Plastic Surgery and Vascular Surgery). I joined Whipps Cross Hospital General Practice Training Scheme in 2016. Since qualifying as a GP in 2019 I have worked at Elm House Surgery and Cator Medical Centre, as well as a Locum in the South London Area. I enjoy all aspects of General Practice and I also offer minor surgery and joint injections.


Dr Ali Ali (m)

Salaried GP

I graduated from the University of Cambridge in 2012 where I also spent a year studying Arabic, Theology and History. I completed my GP training from the Royal College of General Practitioners in 2018. I have a specialist interest in sports and exercise medicine, where I have worked as a football club doctor. I have a strong background in teaching and training and have been approved as a GP trainer. I was recruited by Cator Medical Centre in October 2020, where I hope to continue to deliver patient care to the highest standards and welcome patient feedback and ideas.


Dr Jenny Huang (f)

Salaried GP

I qualified from Guy’s Kings and St Thomas’ Medical School in 2012 and completed 2 years of foundation training in North West London before moving back south of the river for GP training in Bromley. I joined Cator Medical Centre in 2017.



Dr Sivaja Sithamparapillai (f)

Salaried GP and GP Trainer
I qualified as a doctor in 1997 from Guy’s and St Thomas, London and qualified as a GP in 2002.
I Joined Cator Medical Centre in April 2015. My area of interests are Gynaecology and Family Planning.
I am a GP Trainer since May 2017. I also offer coil and implant clinics as well as baby/ postnatal appointments.



Dr Deepali Patel (f)

Salaried GP
I qualified from the University of Birmingham in 2013 and joined Cator Medical Centre in August 2018 for my GP Registrar year.





Dr Charmaine Ribeiro (f)

Salaried GP 

I qualified from King’s College London in 2013. I completed my foundation training in Oxfordshire followed by GP training back in South London. I started at Cator Medical Centre in January 2020. I am interested in all areas of General Practice but particularly Dermatology and Medical Education.

Dr Umayr Jakhura (m)

Salaried GP

I qualified from Barts and The London School of Medicine in 2014. Having only recently joined Cator Medical Centre in the last month, I am excited to be a part of the team. I have also achieved my Bachelor of Medical Sciences degree​ in Molecular Medicine, which has allowed me to pursue my interest in this field.