The role of the central bank

Thanks to tutor2u for this introductory video
http://www.tutor2u.net/economics/blog/what-is-the-role-of-central-banks-today?utm_medium=email&utm_campaign=Economics%20daily%20digest%20Mon%204th%20January%202016&utm_content=Economics%20daily%20digest%20Mon%204th%20January%202016+CID_b3842c58ba9c88875020b6eb941dbfaa&utm_source=CampMonitor&utm_term=What%20is%20the%20role%20of%20central%20banks%20today%20As%20part%20of%20the%20Bank%20of%20Englands%20Open%20Forum%20this%20short%20introductory%20video%20asks%20people%20what%20is%20the%20role%20of%20a%20central%20bank%20Might%20be%20useful%20as%20a%20starting%20point