Market Sup MAM MAP ASP** Party Name Group Name Participant  ATL SSE Energy Supply Ltd SSE PLC Limited  BGB British Gas Business   BGT British Gas Trading Ltd British Gas Group Formerly Utility Metering Services   ONS Ltd/Onstream  EAS E.ON Energy Gas (Eastern) Ltd   ESL E.ON UK Energy Services Ltd  KIN E.ON Gas Ltd  EMI E.ON Industrial Shipping Ltd E.ON Group  SGL E.ON Energy Solutions Ltd  POW, EOD E.ON Next Limited  UNI E.ON Energy Gas (North West) Ltd  NDS Npower Direct Ltd  NGD, NPC Npower Commercial Gas Ltd  GUK, NRZ Npower Northern Ltd Npower Group  CLT,TCG Npower Gas Ltd  YKE, YGS Npower Yorkshire Ltd   MPS MeterPlus  FUY, FUZ First Utility Ltd  MFA Meter Fit Assets  MFD Meter Fit 20 Ltd  MFE Meterfit North East Ltd  MFM Meter Fit 3 Ltd MeterFit Group  MFS Meter Fit 10 Ltd  MFU Meter Fit 30 Ltd  MFW Meterfit North West Ltd  MFX Meter Fit 2 Ltd  UEL Utilita Energy Ltd  UGL Utilita Gas Ltd Utilita Group   WML Winchester Meter Operations Ltd   SMS Siemens Metering Services   EPM, ONS Enterprise Managed Services Ltd  UFL United Utilities   UUL Calvin Asset Management Ltd Amey Group Formerly Utility Metering Services   ONS, ONX Ltd/Onstream   ECM EDF Energy Customers PLC  LED EDF Energy Customers PLC  LEI EdF Energy plc (I&C) EDF Group  LEP EDF Energy PLC  SBR,SOG EDF Energy Customers PLC  KEL KAL-Energy Ltd G4S Utility and Outsourcing Services (UK) Morrison Data Services   PGM Ltd (part of the Morrison  HBE Holborn Energy Ltd Group)  MRB Marble Power Ltd  OVO OVO Gas Ltd OVO Energy Group  SOP Southern Electric Gas Ltd  UTF Utility Funding Ltd  NPM Northern Powergrid Metering Ltd   LBG Lowri Beck Services Ltd  SSL SGN Smart Ltd SGN   SGM SGN Commercial Services Ltd  ASM AES Smart Metering Ltd  MOR Morrison Utility Services Ltd Morrison Group   ECA SMS Meter Assets Ltd SMS Assets Group  TRJ Trojan Utilities   EAL Energy Assets Ltd   NGR National Grid Smart Limited  MGM Magnum Utilities Ltd  AEL Gas Plus Supply Limited   SUF Stark Utility Funding Limited Stark Group  SIS Stark International Software Limited   SQU Squire Energy Limited  MBB, MLA Macquarie Energy Leasing Ltd  TML Octopus Energy