In the foreign exchange market, which is made up of banks' traders and brokers, prices (61) every minute (62) to supply and demand. For safety's sake, a branch will get a rate from their traders for a big transaction. Therefore the traders give their branches lists of exchange rates (63) they may buy and sell notes and payments in the main currencies. Whenever a bank in Britain makes a payment in foreign currency, or makes a payment in sterling to a non-resident, the payment has first to (64) under British exchange control regulations. The bank itself can usually authorize the payment after seeing a document such as an invoice to show that the payment is due but cases (65) borrowing and lending have to be referred to the Bank of England. (46)