Cybersecurity for Law Firms in the UK

Law firms face targeted phishing, ransomware, and business email compromise (BEC) attacks. According to DSIT's 2025 Cyber Security Breaches Survey, 85% of businesses that experienced a breach identified phishing as the attack vector. For law firms, these attacks specifically target conveyancing funds, client account credentials, and privileged case data. The SRA has reported increasing numbers of firms losing client money through email interception.

The SRA's Warning Notice on cybersecurity expects firms to implement proportionate technical controls, staff training, and incident response procedures. Firms must have MFA on email and case management systems, tested backup procedures, and a documented response plan including SRA notification where client money or data is compromised. Failure to take reasonable steps to protect client data can result in regulatory sanctions and professional negligence claims.

Conveyancing fraud — sometimes called Friday afternoon fraud — involves attackers intercepting email threads between solicitors and clients, then sending fraudulent bank details at the point of exchange. Losses per incident can reach hundreds of thousands of pounds. Essential controls include DMARC and DKIM configuration, encrypted email for financial communications, and mandatory telephone verification of bank details using independently sourced contact numbers.

Whilst not legally mandatory, Cyber Essentials is strongly recommended by the SRA. Organisations holding Cyber Essentials certification are 92% less likely to claim on cyber insurance (IASME). For law firms, certification demonstrates to clients, insurers, and regulators that baseline security controls are independently verified. Local authority legal panels and enterprise clients increasingly require CE or CE+ as a procurement condition.

Legally privileged data demands the highest protection standards. Law firms should enforce role-based access controls on case management systems, implement data loss prevention policies across email and cloud storage, encrypt client files at rest and in transit, and maintain immutable backups. Staff handling privileged material need targeted security awareness training covering social engineering risks specific to legal practice.