The purpose of the GPET-E contracts is for each supplier of GP clinical IT systems to develop the software needed to safely extract and communicate data from (a) practices that use their systems to (b) the NHS Information Centre for Health and Social Care. This is part of a wider project to bring together primary care data that exists in different GP practice systems and present it in a single and consistent format. Also, the GPES and GPES-I Interoperability Standard shall be the means by which Mandatory Extractions (including but not limited to data returns for the Calculating Quality Reporting Service), as may be required under the powers of the Health and Social Care Bill, are delivered to the NHS Information Centre for Health and Social Care.