Mrs T got rid of mmb not europe and royal mail needed privatising.Perhaps if we hadn't relinquished sovereignty to the EU, the MMB would still exist and the Royal Mail wouldn't have been privatised. Both of these actions were done at the behest of the EU to satisfy its competition rules against the better judgement of many British MP's.
Nobody wanted privatisation of Royal Mail. It wasn't on any party's manifesto and nobody here voted for it. Even my own very much right wing MP did not agree with it.
It was the result of loss of sovereignty. It was imposed by unaccountable foreign powers whether we liked it or not and there wasn't a damn thing we could do about it.