ARTICLE 50 CAN IT BE REVOKED ONCE TRIGGERED?

InFacts has a posting by Sir Alan Dashwood, a man with a 40 year career in EU law about Article 50 (HERE). Essentially, he says the question of revocation once the withdrawal process has started will be a political decision.  If they want us back Article 50 will be revoked, if not, it won't and he says it would be hard for the European court of justice to go against this.