Holding(s) in Company

Portland Gas plc
18 February 2008


                                Portland Gas plc
                         ('Portland Gas' or 'Company')

                               Holding in Company

The Company was notified on 15 February that Credit Suisse Securities (Europe)
Limited holds 14,885,924 Ordinary Shares (with an equivalent amount of voting
rights) which represent approximately 21.95 per cent. of the issued ordinary
share capital of the Company.



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