Although I hope that the Supreme Court will be more cautious in its approach, it is possible that yesterday's landmark constitutional judgment preventing the Government from issuing a notification under Article 50 of the Treaty on the European Union will stand.

In which case, Parliament must legislate. This could be done through a small Bill that merely gives a Minister the right to give notice under Article 50 and need not run to more than a couple of clauses. Such a Bill could be passed within hours – but it is possible it could be obstructed.