Holding(s) in Company

Summit Corporation plc ("Summit plc" or "the Company") HOLDINGS IN SUMMIT CORPORATION PLC TR-1: Notification of Major Interests in Shares 3 June 2009, Oxford, UK 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: Summit Corporation Plc 2. Reason for notification (yes/no) An acquisition or disposal of voting rights: Yes An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached An event changing the breakdown of voting rights Other (please specify): 3. Full name of person(s) subject to notification obligation: Barclays plc 4. Full name of shareholder(s) (if different from 3): Barclay's Stockbrokers Ltd 5. Date of transaction (and date on which the threshold is crossed or reached if different): 28 May 2009 6. Date on which issuer notified: 29 May 2009 7.Threshold(s) that is/are crossed or reached: Below notifiable % to 5% 8: Notified Details A: Voting rights attached to shares +-------------------------------------------------------------------------------------+ |Class/type of|Situation previous|Resulting situation after the triggering transaction| |shares |to the Triggering | | | |transaction | | | |------------------+----------------------------------------------------| | |Number |Number of |Number of |Number of Voting |% of Voting Rights | | |of |Voting |Shares |Rights | | | |shares |Rights | |-------------------+--------------------| | | | | |Direct |Indirect |Direct |Indirect | |-------------+-------+----------+-----------+--------+----------+---------+----------| |GB00B02T3K57 | | |2,886,935 |0 |2,886,935 |0.00 |5.16 | +-------------------------------------------------------------------------------------+ B: Financial Instruments +------------------------------------------------------------------------------+ |Resulting situation after the triggering transaction | |------------------------------------------------------------------------------| |Type of |Expiration|Exercise/Conversion|Number of voting rights that |% of | |Financial |date |Period/Date |may be acquired if the |voting| |instrument| | |instrument is |rights| | | | |exercised/converted | | |----------+----------+-------------------+-----------------------------+------| | | | | | | +------------------------------------------------------------------------------+ Total (A+B) +----------------------------------------------+ | Number of voting rights | % of voting rights | |-------------------------+--------------------| | 2,886,935 | 5.16 | +----------------------------------------------+ 9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable: Barclays Stockbrokers Ltd Proxy Voting: 10. Name of proxy holder: 11. Number of voting rights proxy holder will cease to hold: 12. Date on which proxy holder will cease to hold voting rights: 13. Additional information: 14. Contact name: Geoff Smith 15. Contact telephone name: 020 7116 2913 ---END OF MESSAGE--- This announcement was originally distributed by Hugin. The issuer is solely responsible for the content of this announcement.