External Directorship

UNITED UTILITIES PLC                              

                      DR JOHN MCADAM - OTHER DIRECTORSHIP                      

In accordance with Listing Rule 9.6.14 United Utilities PLC reports the
appointment of Dr John McAdam as a Chairman of Rentokil-Initial PLC with effect
from 20 March 2008.

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Further information can be obtained from Jane Gilmore, Deputy Company Secretary
44 1 925 237052.

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United Utilities' ordinary trade on the London Stock Exchange and its ADRs,
each equal to two ordinary shares, trade OTC in the USA under the Trading
Symbol "UUPLY".