A central banks is often referred to as a lender of the last resort, it is where money is printed and where the monetary policy is produced. A monetary policy integrates policies to do with inflation as well as interest rates.

The Bank of England is the central bank in the UK and each country typically has its own central bank.

A central bank of England hosts Government money and can also lend money to other banks who find themselves in financial trouble, hence the idea of it being a lender of the last resort.