Marios Lambis KC

Marios Lambis KC

"Marios is absolutely first class. He is massively experienced in this area and is widely regarded as one of the best. His advocacy is always well crafted and impressively delivered. He richly deserved this recent appointment."

Legal 500 UK 2023
Year of call: 1989 KC: 2022
For enquiries please call: 020 7353 5324 or email vcard cv linkedin save

Professional Discipline

Marios advises and represents clients from a wide variety of industry sectors in cases brought by their regulatory bodies, and in related proceedings in the criminal, civil and coronial courts, and other tribunals. He appears both at first instance and advises on appeals and judicial review applications to the High Court. He specialises in complex and lengthy cases before disciplinary committees, and in the High Court, and is adept at quickly identifying key issues. He is instructed by major indemnity providers and corporate bodies and the regulators to advise and appear on behalf of their members.

He has experience of all forms of interim order and fitness to practice proceedings involving all the major regulators and some governing niche areas.

He has lectured at the General Medical Concil and General Dental Council on particular problems posed in litigation. He has also provided advocacy training to the Medical Protection Society and has been invited to lecture dentists on the issues they should be alive to in respect fitness to practice matters.

Marios was one of only two barristers (the other being a KC) to advise the precursor of the MPTS on the form and nature of its Fitness to Practice Rules.

He has been instructed in cases of the utmost gravity and public concern including those where novel and complex issues of law and procedure arose.



Marios appeared for a doctor facing a multitude of allegations including sexual behavior with a child and viewing of pornography at various venues. He was successful in arguing before the Panel that the GMC bringing proceedings against a doctor for viewing legal pornography in his own home, despite children having access to that computer, was outwith the role of the regulator and an infringement of the doctor’s rights under the Human Rights Act.


Marios defended a GP acquitted of fraud but still facing allegations of dishonesty and serious deficient professional performance. This is believed to be the first case in which the GMC ‘disowned’ its own performance assessment after Marios successfully argued bias on the part of the assessors, even before the GMC called them to give evidence. It led the panel to note that the doctor had been dealt a ‘manifest injustice’ by the GMC.


Marios presented a case for the GMC against a doctor accused of sending defamatory, racist and anti-Semitic correspondence to numerous lawyers, deans and others. He was successful in fendng off an argument on the admissabilty of some of the evidence and was succesful in his application to call rebuttal evidence against the doctor which proved the doctor had lied on oath.

GSCC v W & C

Marios was instructed to advise, prepare and present the much-publicised case against the Social Worker and Team Leader responsible for Peter Connelly (‘Baby P’). It was the first time the regulator sought to ‘join’ two registrants in a single hearing despite its rules not permitting it. Marios prepared detailed arguments and the hearing was ultimately ‘joined’ and both registrants ultimately accepted all the allegations that Marios had drafted against them.


Marios appeared for a doctor who also sat in a judicial capacity referred to the GMC by the President of the Solicitors Regulatory Authority for allegedly sending misleading medical reports and not complying with Good Medical Practice where his tactical preperation and presentation might have an impact on the doctor’s ability to retain his judicial appointment.

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