If I recall correctly, is not the invoking of Article 50 non-revocable?

nickcotter · on March 21, 2019

It's perfectly revocable, until 11pm 29th March.

Opinion is divided as to whether it requires Parliament or if the Government can do it without further ado.

Simulacra · on March 21, 2019

So what happens on March 30th if it is not revoked? Nine days from now is truly the point of no return?

isostatic · on March 21, 2019

Then all treaties the UK is part of with the EU cease to apply

  The Treaties shall cease to apply to the State in question from the date of entry 
  into force of the withdrawal agreement or, failing that, two years after the 
  notification referred to in paragraph 2, unless the European Council, in agreement 
  with the Member State concerned, unanimously decides to extend this period.

That includes things like the treaties that allow planes to fly between the UK and EU, or the UK and the U.S (as the treaties covering that are between the EU and US)

Even overflights of EU by UK will struggle - Chicago allows them, but will EU air safety recognize the UK's CAA

There have been various platitudes about how neither side wants this to happen, but not very clear how legally it will happen.