We should advocate the revoking of Article 50 by Parliament. A second referendum was a tactic that has outlived its usefulness.
The point of a second referendum was that it was thought a more acceptable, less divisive way of stopping Brexit than revoking Article 50; and that since both parties are officially for Brexit, it took it out of Parliament’s hands.
But now the second referendum is less popular in many polls then stopping Brexit. People are tired of the division and focus on this issue. A referendum will sharpen the divisions and suck up all politics and news.