@EDDIE51
Article 50 stipulates procedures in accordance with Article 218(3) of The Lisbon Treaty. (I've copied paras 1-3 to save people having to fetch the context themselves)
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1. Without prejudice to the specific provisions laid down in Article 207, agreements between the Union and third countries or international organisations shall be negotiated and concluded in accordance with the following procedure.
2. The Council shall authorise the opening of negotiations, adopt negotiating directives, authorise the signing of agreements and conclude them.
3. The Commission, [ ... ] shall submit recommendations to the Council, which shall adopt a decision authorising the opening of negotiations and, depending on the subject of the agreement envisaged, nominating the Union negotiator or the head of the Union's negotiating team.
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Unless I'm misreading this, UK will be treated as a "third country", "negotiating directives" are set by the Council and we only get what we're given.
The whole purpose of clubbing together to form a trading bloc is that it gives them clout and the ability to dictate terms by which you get access to consumers within its borders.
The EU is likely to keep on insisting on freedom of movement so our only option for closing the gate is to cease trading with Europe completely. Whatever we cutrently sell to EU, we will have to rapidly find a customer base for, in other parts of the world (which would have to be similar wealth/development level, in order to afford our prices, obviously).