Roz Sullivan

Partner | Public Law & Regulatory

Roz is a Partner and leads our Public and Regulatory Law team.

Roz leads the Public and Regulatory Law team, supporting public bodies to make lawful decisions in line with their statutory functions, and dealing with judicial reviews and procurement challenges.

Roz advises on all areas of public and regulatory law, including regulatory compliance, statutory interpretation, and navigating legal risk in policy decisions. Roz is also a very experienced drafter of rules, regulations and legislation. As a public law specialist, Roz also advises those affected by prospective changes in legislation.

Prior to joining Capital Law, Roz spent almost two decades within Welsh Government, most recently as deputy director of Legal Services and senior civil service lead of the Statutory Instruments group.

Roz is a member of our Executive Team, which is responsible for delivering the firm’s strategy and the day-to-day development of our business.

Expertise

Public law, including:

  • legal risk in public bodies’ decision making
  • constitutional law
  • administrative law, including judicial review
  • public procurement
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Recent work

Regulator

Seconded to work in house for the Gambling Commission in connection with a procurement challenge brought in respect of the award of the National Lottery licence, listed by the Lawyer as being one of the top 20 cases in 2025.

Drafting Rules and Regulations for the Solicitors Regulation Authority

Local Government

Advice and drafting for a local authority in connection with its Standards Committee procedures.

Central Government

Drafting an arrangement under the Government of Wales Act 2006 enabling a public authority to carry out certain of Welsh Ministers’ functions.

Regulatory impacts

Advising an agency on compliance with their regulatory requirements in respect of fitness to practice issues relating to their staff.

Advising a company on the how the requirements of the Health and Social Care (Wales) Act 2025 will impact the business.

Advising a company on strategy in respect of challenging a decision of Natural Resources Wales