RNS Number:7162J
Hyder Consulting PLC
07 April 2003

                      Hyder Consulting plc (the "Company")

                               Additional Listing


Application has today been made to the UK Listing Authority for 83,724 new
ordinary shares of 10p each to be admitted to the Official List, and to the
London Stock Exchange for admission to trading on the London Stock Exchange's
market for listed securities. It is expected that admission will occur and
dealings will commence on 10 April 2003.

These shares have been issued pursuant to the exercise of options under the
Hyder Consulting Holdings Limited Executive Share Option Scheme (the "Hyder
Option Scheme") which became exercisable immediately upon completion of the
acquisition (the "Acquisition") of Hyder Consulting Holdings Limited by Firth
Holdings plc (now renamed Hyder Consulting plc). Under the terms of the Hyder
Option Scheme, the shares in Hyder Consulting Holdings Limited resulting from
any option exercise had to be sold to the Company for a consideration equivalent
to that received by the sellers under the terms of the Acquisition. Further
details of these arrangements are set out in the listing particulars relating to
the Company dated 27 September 2002.

7 April 2003


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