Conversation so far:
Was the union important for the British people?
Despite opposition from within both Scotland and England, a Treaty of Union was agreed in 1706 and was then ratified by the parliaments of both countries.
Was the development of Britishness important?
Yes, despite centuries of military and religious conflict, the Kingdoms of England and Scotland had been drawing increasingly together since the Protestant Reformation.

Question: Were British unions strong?
Self-contained rewrite: Were British unions strong?