Jason Kallis > Keystone Law > London, England > Lawyer Profile
Keystone Law Offices
48 CHANCERY LANE
LONDON
WC2A 1JF
England
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Jason Kallis

Work Department
Construction / property litigation
Position
Jason is a disputes lawyer specialising in insurance, construction, product liability, and property litigation. He acts for blue chip construction and property companies, insurance companies and their Insureds, high-net-worth individuals, retailers and estate managers.
Jason has extensive experience advising on product liability and professional negligence claims. In particular he advises on all insurance policy issues that arise out of disputes concerning products and professionals, including the recovery of insurance premiums on behalf of insurance companies and insureds.
He also has a wealth of experience of disputes concerning high-end residential properties, office developments, and small to medium sized civil engineering projects.
He advises on business disputes concerning small and medium sized companies, particularly in relation to partnership disputes, purchase agreement disputes, shareholder disputes, tax related disputes and general commercial litigation issues faced by such entities.
He has provided non-contentious advice on property developments to lenders, landowners, contractors and developers, and has advised on and drafted building contracts, warranties, and professional appointments.
Career
2014 | Keystone Law | Consultant Solicitor |
2012-2014 | Plexus Law | Associate Partner |
2009-2012 | DAC Beachcroft LLP | Associate Solicitor |
2004-2009 | Mishcon de Reya | Associate Solicitor |
2003-2004 | Sherrards | Associate Solicitor |
2000 | Qualified as a Solicitor |
1998-2003 | Elliots Bond & Banbury | Trainee Solicitor then Assistant Solicitor |
Lawyer Rankings
London > Insurance > Product liability: defendant
Keystone Law is well versed in dealing with a variety of product liability claims stemming from international trade, frequently advising foreign insurers and manufacturers. ‘Knowledgeable, super-diligent‘ practitioner Elaine Chan has a strong track record in high-value product liability claims, including multi-jurisdictional disputes. Antony Colman, a specialist in advising German clients, and Jason Kallis, who stands out for his roster of Japanese and South Korean clients, are also key contacts.
London > Insurance > Clinical negligence: defendant
Keystone Law‘s insurance department represents healthcare professionals in a variety of clinical negligence matters, including natal, spinal and cognitive injury claims, and cases arising from neuro and cosmetic surgeries. Tracy Sell-Peters is experienced in spinal and orthopaedic surgery claims, while Jason Kallis is skilled in medical product liability and cosmetic surgery error cases. Joanne Staphnill is active in litigation involving psychiatric claims and surgical errors. Matthew Trinder, who joined from Browne Jacobson LLP in January 2024, brings a wealth of experience in representing private insurance and independent healthcare providers.
London > Insurance > Insurance and reinsurance litigation
The insurance practice at Keystone Law acts for insurers and reinsurers across a number of sectors including shipping, aviation and life sciences. James Crabtree advises on both insurance and reinsurance claims, coverage disputes and contractual issues, while James Healy-Pratt is an aviation expert and has assisted insurers with claims relating to aviation accidents. Jason Kallis is well versed in complex insurance litigation and Elaine Chan handles product liability claims.
Lawyer Rankings
- Product liability: defendant London > Insurance
- Clinical negligence: defendant London > Insurance
- Insurance and reinsurance litigation London > Insurance
Top Tier Firm Rankings
- Dispute resolution > Commercial litigation: mid-market
- Insurance > Insurance: corporate and regulatory
- Insurance > Insurance: corporate and regulatory
- Corporate and commercial > International business reorganisations
- Insurance > Professional negligence
- Finance > Corporate restructuring & insolvency
- Private client > Charities and not-for-profit
- Private client > Court of protection
- Crime, fraud and licensing > Licensing
- Real estate > Construction: non-contentious
- Real estate > Residential property
Firm Rankings
- Employment > Senior executives
- Private client > Agriculture and estates
- Private client > Family
- Crime, fraud and licensing > Gaming and betting
- Finance > Islamic finance
- TMT (technology, media and telecoms) > Media: Film & TV
- Insurance > Product liability: defendant
- Dispute resolution > Professional discipline
- Transport > Travel
- Private client > Art and cultural property
- Transport > Aviation
- Insurance > Clinical negligence: defendant
- Real estate > Commercial property: corporate occupiers
- TMT (technology, media and telecoms) > Fintech: corporate and commercial
- TMT (technology, media and telecoms) > Fintech: regulatory
- Crime, fraud and licensing > Fraud: civil
- Employment > Immigration: personal
- Insurance > Insurance and reinsurance litigation
- Insurance > Insurance litigation: for policyholders
- Corporate and commercial > M&A: Smaller Deals, £10m-£100m
- TMT (technology, media and telecoms) > Media: Music
- Corporate and commercial > Partnership
- Employment > Pensions (non-contentious)
- Insurance > Personal injury: defendant
- Transport > Shipping
- Finance > Bank lending: investment grade debt and syndicated loans
- Real estate > Construction: contentious
- Employment > Employers
- Employment > Immigration
- TMT (technology, media and telecoms) > Intellectual property: patents (contentious and non-contentious)
- TMT (technology, media and telecoms) > Intellectual property: trade marks, copyright and design
- Projects, energy and natural resources > Oil and gas
- Private client > Personal tax, trusts and probate
- Real estate > Planning
- Projects, energy and natural resources > Power (including electricity and nuclear)
- Real estate > Property litigation
- TMT (technology, media and telecoms) > Reputation management
- Corporate and commercial > Venture capital
- TMT (technology, media and telecoms) > Sport
- Private client > Court of protection
- Insurance > Professional negligence
- Insurance > Insurance: corporate and regulatory
- Industry focus > Life sciences and healthcare