Brexit is going to happen. May won't act to undermine her own position, and to not deliver Brexit would have the Tory party membership up in arms, demanding her head. Of course, if she stretches the process out long enough, half of them will be dead anyway, but even then she's got the swivel-eyed loons on the right of her party to contend with. Probably best to just get it over & done with. The other concern is that for all their blather about democracy, the will of the people & UK sovereignty, the Brexiteers actually don't give a stuff about any of it, unless it goes their way. If they were really interested in democracy & the will of the people, they wouldn't have lied through their teeth in the referendum campaigning, and wouldn't oppose a second referendum at some point. If they truly cared about UK laws & UK sovereignty, we wouldn't see this idiotic reaction to the court ruling over Article 50. No, what worries politicians of all stripes, is how the racists & xenophobes would react to seeing the Leave decision overturned. The Daily Hatemail, Express, and The Scum would be calling for blood, with torches & pitchforks, marching on Parliament, and the likes of Britain First & the EDL lynching foreigners in the street.