Admittedly, I don’t know much about Brexit, but from what I have been exposed to, it seems like a decisively economical and political impairment that made travel and business with the rest of Europe more difficult and costly. Since it is so highly criticized as a terrible move, why doesn’t the UK just rejoin the EU?
The EU deal was nothing to do with Thatcher. She never wanted the UK to join the EU and vehemently opposed the Maastricht Treaty.
She supported economic union, not political.