RNS Number:5192D
National Grid Gas PLC
07 September 2007

            National Grid Gas plc and National Grid Gas Holdings plc



National Grid Gas plc and National Grid Gas Holdings plc announce bond issuer
substitution.

National Grid Gas plc has been substituted for National Grid Gas Holdings plc as
principal debtor in respect of the three bonds listed below. National Grid Gas
Holdings plc is guarantor of the bonds. The listing of the bonds will be
transferred from the Regulated Market of the London Stock Exchange plc to the
Professional Securities Market of the London Stock Exchange.


#503,078,000 4.1875 Index-Linked Bonds due 2022 ISIN: XS0103338140
(following previous repurchases for cancellation, the outstanding amount is
#403,624,000)

#503,078,000 7.0 per cent. Fixed Rate Bonds due 2024 ISIN: XS0103338496
(following previous repurchases for cancellation, the outstanding amount is
#364,470,000)

#503,078,000 Floating Rate Bonds due 2009 ISIN:XS0103338652
(following previous repurchases for cancellation, the outstanding amount is
#214,170,000)


Enquires:

Media
Clive Hawkins    +44 (0) 20 7004 3147

Investors
Andrew Kluth     +44 (0) 20 7004 3365




                      This information is provided by RNS
            The company news service from the London Stock Exchange
END

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