Tristan Hall
Co-Head of the CMS Insurance Sector Group
Languages
- English
Tristan Hall co-leads CMS’s cyber incident response practice and has advised on cyber matters for over a decade. He acts as breach counsel to businesses responding to ransomware attacks, cyber extortion, data exfiltration and other cyber incidents.
During live incidents, Tristan advises boards and incident response teams on regulatory notification, engagement with regulators and affected stakeholders, and the legal issues around ransom payment decisions, including sanctions and other restrictions. He regularly coordinates the legal response to incidents spanning multiple jurisdictions, working with CMS cyber and data protection specialists internationally as part of the firm’s global 24/7 cyber incident response capability.
Tristan also represents organisations in contentious investigations by data protection regulators following cyber incidents, including responding to formal information notices.
Before an incident occurs, Tristan advises businesses on cyber preparedness, including incident response planning, crisis management procedures and tabletop exercises.
Tristan also has extensive experience advising insurers on cyber insurance coverage. He advises on issues arising from ransomware, data breaches, business interruption, technology failures and incidents involving critical third-party service providers. He also advises insurers on cyber policy wordings, product development and incident response arrangements.
Relevant experience
Lectures list
Education
Tristan Hall is Co-Head of the CMS Insurance Sector Group and has more than 20 years’ experience advising on complex insurance claims and coverage disputes in the UK and internationally.
His insurance practice has a particular focus on financial lines, including Directors’ & Officers’ liability (D&O), Financial Institutions, Professional Indemnity, Crime, Technology E&O and Cyber insurance.
He regularly advises insurers and insureds on high-value, complex and multi-party coverage disputes, including claims with significant regulatory, cross-border and reputational dimensions.
Tristan also acts for professional services firms, directors, financial institutions and other insureds in the defence of significant professional negligence and financial lines claims.
Alongside his contentious practice, Tristan advises insurers on policy wordings, product development and bespoke insurance solutions.
As Co-Head of the CMS Insurance Sector Group, Tristan helps lead the firm’s international insurance practice and works with insurers, brokers and corporate policyholders across the global insurance market.
