What is the basic unit of currency in Britain, and when was the conversion to the decimal system of coinage completed?

What is the history and current status of the Bank of England, and what other institutions are involved in banking and financial services in the UK?

What is the role of the City of London in the UK's financial services sector, and what types of markets and products does it specialize in?

How has the financial services sector in the UK evolved in recent years, and what challenges has it faced?