A new Finance Director has recently been appointed and is trying to develop a more efficient cash management system. She believes the business is not managing its cash well and could make savings or make risk management easier if they had better ways of ensuring consistent cashflows. She also thinks there may be a better way to manage the banking and cash management systems from a group perspective, rather than allowing each subsidiary to have their own banking arrangements. How would you advise the Finance Director on banking structures or other things the business could do to make their cash management more efficient?