ASKER, NORWAY (10 May 2011) - TGS has updated the attendance and proxy forms for the 2011 Ordinary General Meeting that was published this morning.  The deadline to return the attendance form, power of attorney and proxy statement is 6 June 2011 at 12:00 CET and not 3 June 2011 as originally published.  This error only affected the documents posted to the stock exchange and was corrected in the documents mailed directly to shareholders.  The corrected forms are connected to this release and can be found on the TGS website.

Updated Attendance and Proxy Form 2011:  English  Norwegian

TGS apologizes for this oversight.