Substantial Shareholders

The following companies and individuals had notified the Company of shareholdings of 3% or more in the issued share capital of the Company at 31st March 2008:

  Number of ordinary
shares of 1p each
 
Mr. Landon T Clay and Associates 10,966,052 25.40%
Compagnie Generale de Geophysique-Veritas S.A. 6,476,266 15.00%
Fidelity International Ltd 3,154,965 7.31%
Southampton Asset Management Ltd 3,119,057 7.22%
Lehman Brothers International (Europe) 2,043,000 4.73%

The current number of shares in issue at 31st March 2008 is 43,175,110 ordinary shares of 1p each of which 52.99% are in public hands.