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Guaranteed Standards 

The guaranteed standards set out service levels that must be met by each distribution company. These standards have been set to guarantee a level of service that is reasonable to expect companies to deliver in all cases.


If the distribution company fails to meet the level of service required, it must make a payment to the customer subject to certain exemptions. Payments under the guaranteed standards compensate for the inconvenience caused by loss of supply. They are not designed to compensate customers for subsequent financial loss. Ofgem monitors and enforces the guaranteed standards relating to quality of supply.


The guaranteed standards cover 12 key service areas, including supply restoration, connections, and voltage quality. 



DateTitle (Click for more document information)
15/02/2011Distributed Generation Standards Direction Guidance Document
06/10/2010Direction under paragraph 15A.16 of standard condition 15A (Connection Policy and Connection Performance) of the Electricity Distribution Licence.
13/09/2010Open Letter on the Electricity (Standards of Performance) Regulations 2010
08/09/2010Standard Licence Condition 15A Guidance Document
03/09/2010Notification of the publication of The Electricity (Standards of Performance) (Amendment) Regulations 2010
24/08/2010Notice under paragraph 15A.23 of Standard Condition 15A - Connection Policy and Connection Performance - of the Electricity Distribution Licence
13/07/2010Open Letter on the timeline for implementing Guaranteed Standards for Connections and Distributed Generation Customers
24/03/2010Notification of publication of The Electricity (Standards of Performance) regulations 2010
05/11/2009Open letter on Ofgem’s proposals to introduce new connections standards of performance and revise existing standards of performance for electricity distributors
- (Reference number: 137/09)
11/04/2007Table of Guaranteed Standards
28/04/2006Guaranteed Standards: Ofgem Guidance and Proposals on Best Practice Electricity Distribution
01/04/2005Letter on Electricity Standards of Performance Regulations 2005
- (Reference number: 110/05)
04/03/2005Direction revoking overall standards of performance for electricity distributors
16/02/2005Draft Quality of Service Regulatory Instructions and Guidance (rigs) version 5 - covering letter
- (Reference number: 49a/05)
10/01/2005Revised standards of performance arrangements for electricity distributors - Consultation on the draft Statutory Instrument for Guaranteed Standards and revocation of the Overall Standards of Performance
22/10/2004Draft Statutory Instrument
- (Reference number: 245/04b)
22/10/2004Open letter on Ofgem's proposals to implement revised standards of performance arrangements for electricity distributors
08/03/2004Determination by the Gas and Electricity Markets Authority of a dispute referred to under section 39B of the Electricity Act 1989 (as amended)
29/04/2002OVERALL DISTRIBUTION STANDARDS OF PERFORMANCE 'quot;amp;#8211; GENERIC VERSION
17/04/2002Multiple Interruptions - Determination of Overall Distribution Standards of Performance
29/03/2002Development of multiple interruption and other standards for electricity distribution
22/01/2002Development of multiple interruption and other standards for electricity distribution Introduction of standards
29/11/2001Development of Multiple Interruption and other standards for electricity distribution
06/11/2001Development of Multiple Interruption and other standards for electricity distribution - Initial Proposals
07/08/2001Development of Multiple Interruption and Other Standards for Electricity Distribution: Initial Thoughts
07/08/2001EA Technology Report (only available electronically)
29/01/2001Guaranteed and overall standards of performance - Final proposals
29/05/1999Quality of supply: attitudes of business and domestic electricity customers. Research study conducted for OFFER by MORI, January - March 1999
29/11/1998Report on distribution and transmission system performance 1997/98