UK OFSI and the Post-Brexit Sanctions Architecture

The Statutory Foundation: SAMLA 2018

The United Kingdom's autonomous sanctions architecture rests on the Sanctions and Anti-Money Laundering Act 2018 (SAMLA), enacted on 23 May 2018 to provide domestic legal authority for sanctions following the UK's departure from the European Union. Before SAMLA, the UK implemented sanctions almost entirely through directly applicable EU regulations under Section 2(2) of the European Communities Act 1972. SAMLA replaced that framework: Section 1 empowers an appropriate Minister to make sanctions regulations by statutory instrument to comply with UN obligations or for purposes including national security, the prevention of terrorism, foreign-policy objectives, and the promotion of human rights.

Operational implementation of financial sanctions is handled by the Office of Financial Sanctions Implementation (OFSI), established within HM Treasury in March 2016 — initially as a domestic counterpart to OFAC, and after 31 January 2020 (the UK's formal EU exit) as the operational hub of an independent sanctions regime. OFSI maintains the UK Sanctions List (the consolidated list of designated persons) under Section 22 of SAMLA, issues general and specific licences under Schedule 5, and assesses civil monetary penalties under Sections 146–149 of the Policing and Crime Act 2017.

Designation Standards and the Russia Regulations

UK designations follow a two-limb test: the Minister must have reasonable grounds to suspect that the person is an "involved person" within the relevant regime, and the designation must be appropriate having regard to the regime's purposes. The leading instrument since 2022 has been the Russia (Sanctions) (EU Exit) Regulations 2019 (SI 2019/855), expanded by more than fifteen amendment instruments following the 24 February 2022 invasion of Ukraine. Regulation 6 sets the designation criteria; Regulations 11–18A impose asset freezes; Regulations 18B–18F impose the post-2022 price-cap regime on Russian crude oil and petroleum products, coordinated with the G7+ Price Cap Coalition announcement of 2 September 2022.

UK designation criteria diverge meaningfully from the EU's. The EU's Council Regulation 269/2014 historically required a closer nexus to specific destabilising conduct; the UK's 2022 amendments introduced broader "involved person" language capturing those "obtaining a benefit from or supporting" the Government of Russia, which enabled designations of figures such as Roman Abramovich (10 March 2022) and Alisher Usmanov (3 March 2022) earlier and on broader grounds than initial EU listings.

Enforcement Powers and the Strict-Liability Pivot

OFSI's enforcement toolkit was significantly strengthened by the Economic Crime (Transparency and Enforcement) Act 2022, enacted on 15 March 2022. Section 54 amended the Policing and Crime Act 2017 to remove the requirement that OFSI prove the person knew or had reasonable cause to suspect they were breaching sanctions — establishing a strict-liability civil standard for monetary penalties up to the greater of £1 million or 50% of the breach value. The Act also empowered OFSI to publish details of breaches even where no penalty is imposed (a "name and shame" disclosure power that took effect 15 June 2022).

Criminal enforcement remains with the National Crime Agency and the Crown Prosecution Service, with maximum penalties of seven years' imprisonment under Section 17 of SAMLA. The Office of Trade Sanctions Implementation (OTSI), launched 10 October 2024 within the Department for Business and Trade, now handles civil enforcement of trade sanctions previously falling between OFSI's financial remit and HMRC's export-control jurisdiction.

Divergence from EU Regimes

Since 1 January 2021, when the Brexit transition period ended, UK and EU sanctions have operated as independent legal systems even when targeting the same conduct. Three structural differences matter for practitioners:

First, listing speed and grounds. The UK Sanctions List and the EU Consolidated List are maintained separately and update on different timetables. The UK designated 1,271 Russia-related persons by April 2024; the EU had listed roughly 2,000 by the same date under Council Decision 2014/145/CFSP. Overlap is substantial but not complete — and the legal basis for inclusion in each list is the domestic UK regulation or the EU Council Decision, not mutual recognition. A frozen asset under UK law is not automatically frozen under EU law, and vice versa.

Second, licensing. OFSI grants licences under Schedule 5 of the relevant regulations; the EU operates through competent authorities of each Member State applying Article 6 derogations under Council Regulation 269/2014. A UK general licence — for example, GL INT/2023/2711256 authorising legal-fee payments up to £500,000 — has no extraterritorial effect on EU persons or transactions, who must seek separate authorisation from, for example, the French Direction générale du Trésor or German Bundesbank.

Third, sectoral measures. The UK's oil price cap implementation (Regulation 46Z of the Russia Regulations, in force 5 December 2022 for crude and 5 February 2023 for refined products) uses an attestation model closely aligned with OFAC's Determination of 22 November 2022, while the EU's Article 3n of Council Regulation 833/2014 adopts a similar but textually distinct framework. The three regimes coordinate through the Price Cap Coalition but enforce independently.

Coordination With OFAC and the Trilateral Mechanism

The UK, US, and EU formalised sanctions coordination through the Russian Elites, Proxies and Oligarchs (REPO) Task Force, announced 26 February 2022, and through bilateral channels between OFSI and OFAC's Office of Global Targeting. The two offices regularly issue parallel designations on the same day — for instance, the joint UK–US–EU designation of Wagner Group financial network actors on 24 February 2023, and the trilateral targeting of the Russian gold trade in June 2022.

For compliance officers, the practical consequence is layered exposure. A London-incorporated bank clearing a USD payment for an EU client transacting with a UK-listed person faces concurrent OFSI jurisdiction (UK nexus), OFAC jurisdiction (USD clearing through correspondent accounts in New York), and potentially EU jurisdiction (client domicile). The three regimes' lists, licensing terms, and de-listing procedures must each be checked separately. The Russia (Sanctions) (EU Exit) (Amendment) Regulations 2023 introduced a UK-specific reporting obligation on "relevant firms" under Regulation 70, requiring disclosure of frozen assets and suspected breaches to OFSI within set timeframes — an obligation distinct from US 50 USC § 1705 reporting and EU Member State reporting under Article 8 of Regulation 269/2014.

Understanding which authority controls which leg of a transaction — and which licence regime applies to each — is now the central technical skill of post-Brexit sanctions compliance.