Summit Corporation plc
(?Summit plc? or ?the Company?)

HOLDINGS IN COMPANY

TR-1: Notification of Major Interests in Shares

Oxford, UK, 7 January 2010

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:


  * An acquisition or disposal of financial instruments which may result in the
    acquisition of shares already issued to which voting rights are attached


  * An acquisition or disposal of instruments with similar economic effect to
    qualifying financial instruments


  * An event changing the breakdown of voting rights


  * Other (please specify): Participation in placing



3. Full name of person(s) subject to notification obligation:
Lansdowne Partners Limited being the General Partner of Lansdowne Partners
Limited Partnership
Lansdowne Partners International Limited


4. Full name of shareholder(s) (if different from 3):
Vidacos Nominees Ltd (Registered Shareholder)


5. Date of transaction (and date on which the threshold is crossed or reached if
different):
31 December 2009


6. Date on which issuer notified:
5 January 2010


7. Threshold(s) that is/are crossed or reached:
Thresholds from 10% to 29%


8: Notified Details

A: Voting rights attached to shares

+-------------+---------------------+------------------------------------------+
|Class/type of|Situation previous to|Resulting situation after the triggering  |
|shares       |the Triggering       |transaction                               |
|             |transaction          |                                          |
|             +----------+----------+-------+------------------+---------------+
|             |Number of |Number of |Number |Number of Voting  |% of Voting    |
|             |shares    |Voting    |of     |Rights            |Rights         |
|             |          |Rights    |Shares +------+-----------+------+--------+
|             |          |          |       |Direct|Indirect   |Direct|Indirect|
+-------------+----------+----------+-------+------+-----------+------+--------+
|GB00B02T3K57 |4,470,000 |4,470,000 |       |      |49,708,691 |      |29.90%  |
+-------------+----------+----------+-------+------+-----------+------+--------+
B: Financial Instruments
+------------------------------------------------------------------------------+
|Resulting situation after the triggering transaction                          |
+------------+------------+---------------------+---------------------+--------+
|Type of     |Expiration  |Exercise/Conversion  |Number of voting     |% of    |
|Financial   |date        |Period/Date          |rights that may be   |voting  |
|instrument  |            |                     |acquired if the      |rights  |
|            |            |                     |instrument is        |        |
|            |            |                     |exercised/converted  |        |
+------------+------------+---------------------+---------------------+--------+
|            |            |                     |                     |        |
+------------+------------+---------------------+---------------------+--------+
C:   Financial Instruments with similar economic effects to Qualifying Financial
Instruments

+------------------------------------------------------------------------------+
|Resulting situation after the triggering transaction                          |
+------------+----------+------------+------------+------------+---------------+
|Type of     |Exercise  |Expiration  |Exercise/   |Number of   |% of voting    |
|financial   |price     |date        |Conversion  |voting      |rights         |
|instrument  |          |            |period      |rights      |               |
|            |          |            |            |instrument  |               |
|            |          |            |            |refers to   |               |
+------------+----------+------------+------------+------------+-------+-------+
|            |          |            |            |            |Nominal|Delta  |
+------------+----------+------------+------------+------------+-------+-------+
|            |          |            |            |            |       |       |
+------------+----------+------------+------------+------------+-------+-------+

Total (A+B+C)
+-------------------------+--------------------+
| Number of voting rights | % of voting rights |
+-------------------------+--------------------+
| 49,708,691              | 29.90%             |
+-------------------------+--------------------+

9. Chain of controlled undertakings through which the voting rights and /or the
financial instruments are effectively held, if applicable:
Lansdowne Partners International Limited is the parent undertaking of Lansdowne
Partners Limited

Proxy Voting:

10. Name of proxy holder: Lansdowne Partners Limited
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: Hugh Orange
15. Contact telephone name: +44 20 7408 8573

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