On January 8 2019, ACER published an open letter on the withdrawal of the UK from the EU and implications on the registration of market participants and data collection under REMIT.
Market participants that are established or resident in the UK, or market participants from third countries registered in the UK, who wish to enter into transactions or place orders to trade in the EUs wholesale energy markets after the UK’s withdrawal from the EU on 29 March 2019 will need to be registered with a NRA of another EU Member State where they are predominantly active.
In case the market participant is predominantly active in the Netherlands, they may already prepare their registration. To this end, the market participant should use the ‘change member state’ functionality in CEREMP. Until the withdrawal of the UK from the EU, they will be registered solely in the UK.