Stopping Brexit? EU's top court hears UK exit reversal case

FILE PHOTO: Anti-Brexit demonstrators wave flags outside the Houses of Parliament in London, Britain, November 13, 2018. REUTERS/Toby Melville/File Photo

LONDON (Reuters) - Europe's top court will hold an urgent hearing on Tuesday over whether Britain can unilaterally reverse its decision to leave the EU, in a case supporters of membership hope could pave the way to a second referendum and ultimately stop Brexit.

The European Court of Justice (ECJ) is being asked to interpret whether Article 50 of the Lisbon Treaty - the mechanism by which Britain notified the European Union of its intention to leave - can be revoked.