Severn Trent PLC

Prospectus • Dec 2, 2020

FIRST SUPPLEMENTARY PROSPECTUS DATED 2 DECEMBER 2020 TO THE PROSPECTUS DATED 25 AUGUST 2020

SEVERN TRENT UTILITIES FINANCE PLC

(incorporated with limited liability in England and Wales with registered number 2914860)

as an Issuer

SEVERN TRENT PLC

(incorporated with limited liability in England and Wales with registered number 2366619)

as an Issuer

SEVERN TRENT WATER LIMITED

(incorporated with limited liability in England and Wales with registered number 2366686) as the Guarantor of Notes issued by Severn Trent Utilities Finance Plc

€6,000,000,000 Euro Medium Term Note Programme

This Supplementary Prospectus (the "Supplementary Prospectus" which definition shall also include all information incorporated by reference herein), which constitutes a supplementary prospectus for the purposes of Article 23 of Regulation (EU) 2017/1129 (the "Prospectus Regulation"), is supplemental to and should be read in conjunction with the prospectus dated 25 August 2020 (the "Prospectus"), and is prepared in connection with the €6,000,000,000 Euro Medium Term Note Programme (the "Programme") established by Severn Trent Plc and Severn Trent Utilities Finance Plc (each an "Issuer" and together the "Issuers") and guaranteed by Severn Trent Water Limited (the "Guarantor"). Except as otherwise provided in this Supplementary Prospectus, terms and expressions defined in the Prospectus have the same meaning when used in this Supplementary Prospectus.

The purpose of this Supplementary Prospectus is to is to incorporate by reference into the Prospectus the interim financial information for the six months to 30 September 2020 (the "Interim Results").

Interim Results

On 26 November 2020, Severn Trent Plc published its Interim Results.

A copy of the Interim Results has been filed with the Financial Conduct Authority and by virtue of this Supplementary Prospectus, the following sections of the Interim Results are incorporated in, and form part of, this Supplementary Prospectus and the Prospectus:

• the heading "Condensed consolidated income statement" and the table thereunder;
• the heading "Condensed consolidated statement of comprehensive income" and the table thereunder;
• the heading "Condensed consolidated statement of changes in equity" and the table thereunder;
• the heading "Condensed consolidated balance sheet" and the table thereunder;
• the heading "Condensed consolidated cash flow statement" and the table thereunder; and
• the section entitled "Notes to the condensed interim financial information".

The Interim Results have been properly prepared on the basis set out in Note 1 on page 23 of the Interim Results and, as stated therein, the basis of accounting used is consistent with the accounting policies of the Group.

Any information contained in the Interim Results which is not expressly incorporated by reference in this Supplementary Prospectus does not form part of this Supplementary Prospectus and is either not relevant to investors or is covered elsewhere in the Supplementary Prospectus or the Prospectus. Any information or documents which are incorporated by reference, either expressly or implicitly, in the Interim Results incorporated by reference in this Supplementary Prospectus shall not form part of this Supplementary Prospectus for the purposes of the Prospectus Regulation.

Significant Change

There has been no significant change in the financial performance or financial position of (i) Severn Trent Plc and its subsidiaries taken as a whole, since 30 September 2020; (ii) STWL and its subsidiaries taken as a whole, since 31 March 2020; and (iii) STUF, since 31 March 2020.

General Information

The Issuers and the Guarantor accept responsibility for the information contained in this Supplementary Prospectus. To the best of the knowledge of the Issuers and the Guarantor (each having taken all reasonable care to ensure that such is the case) the information contained in this Supplementary Prospectus is in accordance with the facts and does not omit anything likely to affect the import of such information.

Copies of this Supplementary Prospectus, the Prospectus and all documents or information incorporated by reference in this Supplementary Prospectus are available for inspection during normal office hours from the registered office of each Issuer and from the specified offices of the Paying Agents.

To the extent that there is any inconsistency between (a) any statement in this Supplementary Prospectus or any statement incorporated by reference into the Prospectus by this Supplementary Prospectus and (b) any other statement in or incorporated in the Prospectus prior to the date of this Supplementary Prospectus, the statements in (a) above will prevail. Save as disclosed in this Supplementary Prospectus there has been no other significant new factor, material mistake or inaccuracy relating to information included in the Prospectus since the publication of the Prospectus.