EU court adviser to publish opinion on Brexit reversibility case on Dec. 4

European Union flags are seen outside the EU Commission headquarters in Brussels, Belgium November 14, 2018. REUTERS/Francois Lenoir

LONDON (Reuters) - The advocate general of the European Union's top court will give his opinion on Dec. 4 as to whether Britain can unilaterally reverse Brexit, the court said on Wednesday.

The European Court of Justice (ECJ) held an urgent hearing in a case about whether Britain can revoke its notice to withdraw from the EU under Article 50 of the Lisbon Treaty without agreement of the other 27 states.