The courts have never ruled what the "constitutional requirements" are for a British government minister to revoke the notice, already given under Article 50, of the UK's intention to leave the EU.  I want to get this question answered in court, putting an end to the uncertainty.

Some experts say that an Act of Parliament permitting the revocation of Article 50 would be needed.  (There isn't one yet.)  Others disagree. 

The present Prime Minister, Boris Johnson, has said he doesn't intend to revoke Ariticle 50.  But who knows who will be Prime Minister if and when the EU refuses to extend Article 50, perhaps in just over a month's time?

Please help me to get the uncertainty settled once-and-for-all.