Yesterday, Advocate General Campos Sanchez-Bordona (AG) delivered his Opinion in Case C621/18 Wightman and others v Secretary of State for Exiting the European Union, concerning the question of whether a formal notification to the European Council to withdraw from the European Union can be revoked by the member state giving the notice without the prior consent of the Council (or any other of the EU institutions) or prior agreement of EU member states (i.e. unilaterally). The