1. Design and buildTestShadowGo live Oct 15Nov 15Dec 15Jan 16Feb 16Mar 16Apr 16May 16Jun 16Jul 16Aug 16Sep 16Oct 16Nov 16Dec 16Jan 17Feb 17Mar 17Apr 17 Oct 15Nov 15Dec 15Jan 16Feb 16Mar 16Apr 16May 16Jun 16Jul 16Aug 16Sep 16Oct 16Nov 16Dec 16Jan 17Feb 17Mar 17Apr 17 Integrated Market Opening Plan – 15 April 2016 Repeat activity All trading parties Trial trading parties MOSL and all TPs Defra MOSLOpen WaterOfwat KEY HoP = Houses of Parliament TP = trading party Critical milestone Milestone TP engage- ment survey TP engage- ment survey TP engage- ment survey TP engage- ment survey TP engage- ment survey TP engage- ment survey

2. Oct 15Nov 15Dec 15Jan 16Feb 16Mar 16Apr 16May 16Jun 16Jul 16Aug 16Sep 16Oct 16Nov 16Dec 16Jan 17Feb 17Mar 17Apr 17 Oct 15Nov 15Dec 15Jan 16Feb 16Mar 16Apr 16May 16Jun 16Jul 16Aug 16Sep 16Oct 16Nov 16Dec 16Jan 17Feb 17Mar 17Apr 17 Design and buildTestShadowGo live Repeat activity All trading parties Trial trading parties MOSL and all TPs Defra MOSLOpen WaterOfwat KEY HoP = Houses of Parliament TP = trading party Critical milestone Milestone SoS decision on retail exit applications GSS consultation responses Finalised WSSL licence Consultation responses Deemed contracts and ISC Ofwat open application process and handle applications Ofwat consult on application process and hold industry workshops Consult on ISC policy Cross-border regulations in HoP Parliamentary process GSS recommend to Defra and Welsh govt. Consult on deemed contracts Consult on draft retail exit code Draft appeals regime for the codes Consult on appeals regs Appeals regulations in HoP Interim Supply Customer Protection Statutory Codes Retail exits Consult on ISC legal text Publish Interim Supply Code Appeals system in place Ofwat finalise WSSL WSSL handover to Defra Draft provisions for transition from old to new WSL arrangements Consult on draft WSSL licence Prepare SoS WSSL authorisation to Ofwat & consult Welsh Ministers Changes to Instrument of Appointment Commence Retail Sections 1 & 4 and Schedules 2 & 4 Procedure for granting WSSL licences (s.25) Licensing Approval of new WSSL and priority changes to WSL and IoA Publish WSSL licence Consult on draft code of practice & customer protection licence condition Publish CP code of practice Develop draft Retail Exits Code Issue Interim Supply Code Election of enduring Code Panel Develop draft Interim Supply Code Run application process GSS regulations in HoP GSS regs in force Stat con on MAC and WRC SoS 28 day veto period Publish retail exit code Consult on wider customer protection policy issues Ofwat develop application details SoS WSSL authorisation to Ofwat WSSL application opens WSSL application deadline for market opening Engage Stakeholders & Parliamentarians’ Retail exit regulations in HoP Retail Exit application process opens Retail Exit application deadline for exit at market opening Issue Retail Exits Code Deadline for WSSL applications to meet opening of Defra exit process Run Retail Exit application process SoS decision on MAC and WRC