SI 2018/1094.

The Special Fissile Materials (Right of Use and Consumption) (EU Exit) Regulations 2018.  Comes into force on Brexit day.  These Regulations end the unlimited right of use and consumption of special fissile materials, granted under Article 87 of the Euratom Treaty, as the collective ownership of special fissile materials, under Article 86 of the Treaty, will cease to be effective on the date the UK withdraws from the Treaty.