Holding(s) in Company

Gas Turbine Efficiency PLC
30 May 2007



                           Gas Turbine Efficiency plc
                  ('Gas Turbine Efficiency' or 'the Company')

                            Notification of Interest


The Company was notified on 14 May 2007 that Gartmore Investment Limited has, as
a result of an acquisition of voting rights, increased its interest in Gas
Turbine Efficiency to 3,281,578 ordinary shares representing 5.80 per cent. of
the issued share capital of the Company.

The Company's issued capital consists of 56,601,594 ordinary shares of 0.2p each
('Ordinary Shares'), all with voting rights.

The above figure (56,601,594 Ordinary Shares) may be used by shareholders as the
denominator for the calculation by which they will determine if they are
required to notify their interest in, or a change in their interest in, the
Company under the FSA's Disclosure and Transparency Rules.


Enquiries:

Gas Turbine Efficiency plc
Steven Zwolinski, CEO                 [phone]

Libertas Capital
Aamir Quraishi                        [phone]




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