+-----------------------------------------------------------+
| TR-1: Notifications of Major Interests in Shares |
+-----------------------------------------------------------+
+-------------------------------------------------------------------+----------+
|1: Identity of the issuer or the underlying issuer of existing |SThree PLC|
|shares to which voting rights are attached: | |
+-------------------------------------------------------------------+----------+
+------------------------------------------------------------------------------+
|2: Reason for notification (yes/no) |
+--------------------------------------------------------------------------+---+
|An acquisition or disposal of voting rights |yes|
+--------------------------------------------------------------------------+---+
|An acquisition or disposal of qualifying financial instruments which may | |
|result in the acquisition of shares already issued to which voting rights |no |
|are attached | |
+--------------------------------------------------------------------------+---+
|An acquisition or disposal of instruments with similar economic effect to |no |
|qualifying financial instruments | |
+--------------------------------------------------------------------------+---+
|An event changing the breakdown of voting rights |no |
+-----------------------+--------------------------------------------------+---+
|Other (please specify):| |no |
+-----------------------+--------------------------------------------------+---+
| |
+-----------------------------------------------+------------------------------+
|3. Full name of person(s) subject to the | |
|notification | Standard Life Investments Ltd|
| obligation: | |
+-----------------------------------------------+------------------------------+
|4. Full name of shareholder(s) (if different | Vidacos Nominees |
|from 3.): | |
+-----------------------------------------------+------------------------------+
|5. Date of the transaction (and date on which | |
|the threshold |20 January 2010 |
| is crossed or reached): | |
+-----------------------------------------------+------------------------------+
|6. Date on which issuer notified: |21 January 2010 |
+-----------------------------------------------+------------------------------+
|7. Threshold(s) that is/are crossed or reached:|9% |
+-----------------------------------------------+------------------------------+
+----------------------------------------------------------------------+
|8: Notified Details |
+----------------------------------------------------------------------+
|A: Voting rights attached to shares |
+--------------------------------------------+-------------------------+
|Class/type of share If possible use ISIN |GB00B0KM9T71 |
|code | |
+--------------------------------------------+-------------------------+
| |
+----------------------------------------------------------------------+
|Situation previous to the triggering transaction |
+--------------------------------------------+-------------------------+
|Number of shares |Number of voting rights |
+--------------------------------------------+-------------------------+
|11,099,245 |11,099,245 |
+--------------------------------------------+-------------------------+
| |
+----------------------------------------------------------------------+
|Resulting situation after the triggering transaction |
+----------------+-------------------------------------+---------------+
|Number of shares|Number of voting rights |Percentage of |
| | |voting rights |
| +---------------------------+---------+------+--------+
| |Direct |Indirect |Direct|Indirect|
+----------------+---------------------------+---------+------+--------+
|10,747,159 |3,270,143 |7,477,016|2.686%|6.141% |
+----------------+---------------------------+---------+------+--------+
+------------------------------------------------------------------------------+
|B: Qualifying Financial Instruments |
+------------------------------------------------------------------------------+
|Resulting situation after the triggering transaction |
+-------------+-------------+--------------+----------------------+------------+
|Type of |Expiration |Exercise/ |No. of voting rights |Percentage |
|financial |date |conversion |that may be acquired |of voting |
|instrument | |period/date |(if the instrument |rights |
| | | |exercised/converted) | |
+-------------+-------------+--------------+----------------------+------------+
| | | | | |
+-------------+-------------+--------------+----------------------+------------+
+------------------------------------------------------------------------------+
|C: Financial Instruments with similar economic effect 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 | Percentage of voting rights |
+-------------------------+-----------------------------+
| 10,747,159 | 8.827% |
+-------------------------+-----------------------------+
+------------------------------------------------------------------------------+
|9. Chain of controlled undertakings through which the voting rights and/or the|
|financial instruments are effectively held, if applicable: |
+------------------------------------------------------------------------------+
| |
| |
+----------------------------------------------------------------------+
| Proxy Voting: |
| |
+------------------------------------------------------------------+---+
| 10. Name of the 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: | investments_mo@standardlife.com |
| | Standard Life Investments Ltd |
+-------------------------------+---------------------------------+
| 15. Contact telephone number: | (0131) 245 6565 |
| | |
+-------------------------------+---------------------------------+
[HUG#1375662]