This is a new stance. Was this communicated during the 2016 referendum? If not, what's happened to the democracy you keep talking about?
These are the terms of article 50.
Article 50 – Treaty on European Union (TEU)
1. Any Member State may decide to withdraw from the Union in accordance with its own
constitutional requirements.
2. A Member State which decides to withdraw shall notify the European Council of its
intention. In the light of the guidelines provided by the European Council, the Union shall
negotiate and conclude an agreement with that State, setting out the arrangements for its
withdrawal, taking account of the framework for its future relationship with the Union. That
agreement shall be negotiated in accordance with Article 218(3) of the Treaty on the
Functioning of the European Union. It shall be concluded on behalf of the Union by the
Council, acting by a qualified majority, after obtaining the consent of the European Parliament.
3. 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.
4. For the purposes of paragraphs 2 and 3, the member of the European Council or of the
Council representing the withdrawing Member State shall not participate in the discussions of
the European Council or Council or in decisions concerning it.
A qualified majority shall be defined in accordance with Article 238(3)(b) of the Treaty on the
Functioning of the European Union.
5. If a State which has withdrawn from the Union asks to rejoin, its request shall be subject to
the procedure referred to in Article 49.
We first negotiate the terms of withdrawal, then all treaties cease once that withdrawal occurs. You then begin trade talks.
If we have no withdrawal agreement, we leave, cease all treaties and then negotiate.
Did people actually think we were discussing trade deals. Jesus Christ!