The single market
The prime minister does not want Britain to stay in the single market. This is no surprise: May has been repeating since the Conservative party conference in October that her top two Brexit priorities are controlling EU immigration and withdrawing from the jurisdiction of the European court of justice.
Those two objectives are incompatible with membership of the single market and her comments on Tuesday merely confirm that she acknowledges that.
“We will take back control of our laws and put an end to the jurisdiction of the European court in Britain,” May said in her speech. “I want to be clear that what I am proposing cannot mean membership of the single market.”
Single market membership, she said, would mean accepting the EU’s four freedoms – free movement of goods, services, capital and people – and “complying with the EU’s rules and regulations that regulate those freedoms”.
To all intents and purposes, she said, it would mean “not leaving the EU at all”. Instead of membership of the single market, Britain will seek “the greatest possible access to it through a new, comprehensive, bold and ambitious free trade agreement”.
That new trade agreement could, May said, include “elements of current single market arrangements in certain areas”, such as the freedom for the City of London to provide financial services across national borders, since it “makes no sense to start again from scratch”.
https://www.theguardian.com/politics/2017/jan/17/key-points-from-mays-what-have-we-learned
She knows your economy is pretty fecked if there no access to the single market for the City of London.