In 1990 Thatcher warned that the Euro would end European democracy
"...As my right hon. Friend (Mr. Lawson ) said in his first speech after the proposal of a single currency, a single currency is about the politics of Europe, it is about a federal Europe by the back door."
She wasn’t as keen on the German wall falling, as she knew Germany would eventually reunite and become militant again. Being a Brit, can you blame her?