5.4 If a market test results in a change of service provider, both the Project Company and the Authority will need to manage the process carefully to ensure that there is a seamless delivery of services. The main responsibility for managing this process lies with the Project Company, which will also be responsible for ensuring that the new service provider fits in to any relevant interface arrangements with other service providers or the construction subcontractor. However, the Authority and the Project Company will need to inform users and contract managers of the changes and agree any transition arrangements.