When did the Acts of Union 1800, which was represented in Parliament by such unions as New Ross, take effect?
New Ross (UK Parliament constituency): New Ross was a United Kingdom Parliament constituency, in Ireland, returning one Member of Parliament (MP). New Ross (UK Parliament constituency):  It was an original constituency represented in Parliament when the Union of Great Britain and Ireland took effect on 1 January 1801. Acts of Union 1800: The Acts of Union 1800 (sometimes erroneously referred to as a single Act of Union 1801) united the Kingdom of Great Britain and the Kingdom of Ireland (previously in personal union) to create the United Kingdom of Great Britain and Ireland with effect from 1 January 1801.
i don't know