A Fraud squad is a police department which investigates fraud and other economic crimes. The largest Fraud Squad in the United Kingdom is run by the City of London Police who are responsible for policing London's and the UK's main financial hub. The Fraud Squad is part of the City of London Police Economic Crime Department (ECD) It investigates what could be described as traditional fraud offences such as banking frauds; insurance frauds; investment frauds; insider dealing frauds; advance fee frauds and Internet frauds, amongst others. Each team is headed by a Detective Inspector who take it in turn on a weekly basis to act as the "Duty Squad" and they form the immediate response to any calls received concerning new fraud cases.