UK Nuclear Materials Import Licence (NMIL) — Post-Brexit Import Licensing Requirement

Mechanism

The UK's transition period under the EU Withdrawal Agreement ended on 31 December 2020. Nuclear materials (uranium ore/concentrates under HS 2612, and plutonium/enriched or natural uranium/related compounds and spent fuel under HS 2844) had moved freely between the UK and EU member states as part of Euratom/single-market treatment; that treatment lapsed at the end of transition. The UK stood up the Nuclear Materials Import Licence (NMIL) as a standalone control, administered by the Office for Nuclear Regulation (ONR) under the then-Department for Business, Energy and Industrial Strategy (BEIS), with guidance published 31 December 2020 and the requirement taking effect 1 January 2021. (Administration later moved to a digital service under the renamed Department for Business and Trade — a 2025 process change, not a scope change to the underlying requirement.)

Downstream implications

• Adds a licensing step — and associated processing time (historically

~30 days) — to UK imports of uranium ore, concentrates, and enriched/ natural uranium compounds previously moving freely from EU suppliers.

• Part of the broader post-Brexit re-establishment of UK-standalone

nuclear safeguards and trade-control architecture (parallel to the UK's exit from Euratom and stand-up of the ONR's own safeguards regime).

Open questions

• No specific UK statutory instrument number was identified in available

sources for the NMIL itself (as distinct from the general EU Exit trade-continuity legislation); flag if a more precise SI citation surfaces during a later pass.