Original sentence: Its correct use is now restricted to only a few Great Officers who officially represent The Sovereign, and flies above Royal Residences in Scotland when the monarch is not in residence.This design may have seen limited and possibly unofficial use in Scotland until 1707, when the English variant, in which the cross of St George overlayed the St Andrew's cross, was adopted as the flag of the unified Kingdom of Great Britain
Edited sentence: Its correct use is now restricted to only a few Great Officers who officially represent The Sovereign, and flies above Royal Residences in Scotland when they are not in residence, since there is no monarch of Scotland due to the break of the Union in the mid 18th century and as revised in the act of Union in 1801.This design may have seen limited and possibly unofficial use in Scotland until 1707, when the English variant, in which the cross of St George overlayed the St Andrew's cross, was adopted as the flag of the UK and known as the Union Flag