Press release for AG Sanchéz-Bordona's opinion on the possibility of unilateral revocation of Article 50 procedure (ie. Britain stopping Brexit on its own) has been published.
https://curia.europa.eu/jcms/upload/docs/application/pdf/2018-12/cp180187en.pdf
AG argues that Article 50 TEU allows the unilateral revocation of the notification of the intention to withdraw from the EU, until such time as the withdrawal agreement is formally concluded, provided that the revocation has been decided upon in accordance with the Member State’s constitutional requirements, is formally notified to the European Council and does not involve an abusive practice.
While I've grown fond of the idea of the UK ****ing off, I must say that the idea of them revoking Art. 50 procedure and thus effectively accomplishing absolutely nothing is equally appealing.