Deloitte is the brand under which tens of thousands of dedicated professionals in independent firms throughout the world collaborate to provide audit, consulting, financial advisory, risk management, tax, and related services to select clients. Deloitte advises British business leaders on a variety of issues, ranging from organisational change to overseas expansion. An important part of its efforts to increase the competitiveness of British business is through helping to manage their tax affairs effectively and comply with regulations in an increasingly complex global economy. Deloitte is the largest professional services network in the world by revenue and by the number of professionals.