Redemption of £300m Capital Securities

Pennon Group plc (1)

(the Issuer)

NOTICE

to the holders of the

£300,000,000 Perpetual Capital Securities(ISIN: XS1646358728 / Common Code: 164635872)

(the Capital Securities)

NOTICE IS HEREBY GIVEN by the Issuer to the Holders that the Issuer will redeem the Capital Securities in full on 22 May 2020 pursuant to Condition 5.2 (Redemption at the option of the Issuer) of the Capital Securities.

The Capital Securities will be redeemed at their principal amount, together with unpaid periodic returns accrued to (but excluding) 22 May 2020. There are no outstanding Arrears of Returns.

Following redemption of the Capital Securities, (i) the Capital Securities will be cancelled and no further payments of periodic returns will be made and (ii) request will be made to the Financial Conduct Authority (the FCA) for the listing of the Capital Securities on the Official List of the FCA and the admission to trading on the regulated market of the London Stock Exchange to be cancelled.

Unless otherwise defined in this Notice, terms used in this Notice have the meanings given to them in the terms and conditions of the Capital Securities.

For further information, please contact:

Pennon Group plc

Susan Davy / Paul Boote

treasury@pennon-group.co.uk

01392 443 168

Dated: 6 May 2020

(1) LEI: 213800V1CCTS41GWH423