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020 7199 6375


The partners met as trainee solicitors at a North London firm of solicitors in 2003.  Natalia Zimareva-Locke qualified as a solicitor in 2005, whilst Costa Cantaris qualified a year later, in 2006.  Natalia and Costa are both accredited Duty Solicitors and dedicated providers of Legal Aid services.


Costa and Natalia are regularly instructed in high profile cases that receive significant media attention.  Their success rate, coupled with his great client care skills, have ensured a  strong own client following.


Natalia is a fluent Russian speaker; she has written a number of articles on police powers and procedures for a London-based Russian newspaper and has appeared on the Russian state television.  Natalia is regularly instructed in complex criminal and extradition cases. Natalia obtained her Post-Graduate Diploma in Law from Middlesex University and subsequently completed her Legal Practice Course at the College of Law in London.  In addition to legal qualifications, Natalia is also a qualified engineer (she holds a degree in Automation of Biotechnical Systems from Moscow State Academy of Applied Biotechnology) which enables her to apply her technical and mathematical knowledge to complex fraud cases.

© Copyright 2016 - Cantaris Locke Solicitors. All rights reserved. | Telephone. 020 7199 6375 | Email. info@cantarislocke.co.uk

Accredited by the Solicitors' Regulation Authority and the Law Society





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Costa Cantaris obtained his Law degree at Queen Mary University,  one of Europe's leading universities in the field of law, before completing his Legal Practice Course at the College of Law in London.


Costa has vast experience in all areas of Criminal Law. He undertakes hearings at the Magistrates' Courts, including trials, on a regular basis.

Costa prides himself in achieving excellent results when the odds are heavily stacked against his clients. He is known for his tactical nous and legal knowledge. He regularly has cases dismissed prior to trial by identifying flaws in the opponent's case and drafting legal arguments that are successfully argued at Court.  Costa Cantaris speaks German.


We are delighted to announce that Mark Davies, a Fellow of the Institute of Legal Executives, has joined us as a consultant.  Mark has over 30 years of experience in the field of criminal litigation.  Mark has been involved in a great number of high-profile cases, including the recent Hatton Garden conspiracy.  



The head office of firm is located in the Docklands, in East London.  The nearest DLR station is Crossharbour.  The office is a short walk from the station.    


In April 2017 we opened a new office in Stevenage, Hertfordshire.   The office is close to the mainline railway station.  Free parking is available outside this office.  Please telephone us for an appointment.


We are supported by  talented individuals, including solicitors, barristers and experts.  We take pride in instructing some of the best experts, barristers and QCs in the country, tailored to the individual circumstances of our clients. We regularly instruct a broad range of experts, including  facial mapping/ CCTV experts, forensic accountants, psychiatrists/ psychologists and telephonic/data experts.  By identifying evidential weaknesses early on we have been able to collate favourable reports which have resulted in acquittals or cases being dropped at an early stage.



We have a nationwide reputation and numerous successes all over the country. Please see some of our recent high profile cases or

refer to our Twitter account highlighting the results we achieve on a daily basis.


We are required to infom our clients of our complaints procedure from the outset.  We ask our clients initially to raise any complaint they may have with the lawyer conducting the case.  Our complaint handling partner is Natalia Zimareva-Locke.  Our clients are invited to contact Ms Locke if their complaint cannot be resolved by the lawyer conducting the case.  We ask our clients to forward any complaint in writing.  This is an in-house procedure and it does not affect our clients' rights to make full representations to the Legal Ombudsman.  If you do not receive an adequate response within 8 weeks you can complain to the Ombudsman. The address is PO BOX 6806, Wolverhampton, WV1 9WJ. Please note that a complaint must generally be made no later than 6 years from the act or omission or 3 years from when you could have reasonably known of the complaint.


Where Legal Aid is not available, our private charges for road traffic offences start at £150+VAT for a face-to-face consultation.  Our court representation charges start at £350+VAT.  We would be happy to provide a quote based on your particular circumstances and the nature of the case.   We are prepared to work on a fixed fee basis - please call us to discuss.


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