The Royal Bank of Scotland £1 note those holding genuine Bank of England notes. In 1727, the Royal Bank of Scotland began issuing twenty-shilling notes (equivalent to £1). Early banknotes were monochrome, and printed on one side only. The first twenty-shilling notes were dated 8 December 1727 and were hand-signed by a bank cashier and given a unique number. The cashier also added by hand the equivalent value in old Scots pounds — a currency that had been abolished 20 years earlier in the Acts of Union 1707 which united the Kingdoms of England and Scotland into the Kingdom of Great Britain. Twenty shillings was equivalent to
Constitution of the United Kingdom two Acts of Union which were passed by the Parliaments of both nations. The Treaty, along with the subsequent Acts, brought into existence the Kingdom of Great Britain, uniting the Kingdom of England and the Kingdom of Scotland. Common law legal systems exist in Northern Ireland and in England and Wales, but not in Scotland which has a hybrid system (see Scots law) which includes a great deal of Common Law. Court judgments also commonly form a source of the constitution: generally speaking in English Law, judgments of the higher courts form "precedents" or "case law" that binds lower courts