+-----------------------------------------------------------+
| TR-1:          Notifications of Major Interests in Shares |
+-----------------------------------------------------------+



+-------------------------------------------------------------------+
| 1:       Identity of the issuer or the underlying    |            |
| issuer of existing shares to which voting rights are | SThree PLC |
| 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   | no  |
| already issued to which voting rights are attached          |     |
|-------------------------------------------------------------+-----|
| An acquisition or disposal of instruments with similar      | no  |
| economic effect to 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      |  Standard Life    |
| notification                                  | 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                                 | 09 December 2009  |
|       is crossed or reached):                 |                   |
|-----------------------------------------------+-------------------|
| 6. Date on which issuer notified:             | 10 December 2009  |
|-----------------------------------------------+-------------------|
| 7. Threshold(s) that is/are crossed or        | 9%                |
| reached:                                      |                   |
+-------------------------------------------------------------------+



+-------------------------------------------------------------------+
| 8:    Notified Details                                            |
|-------------------------------------------------------------------|
| A:      Voting rights attached to shares                          |
|-------------------------------------------------------------------|
| Class/type of share  If possible  | GB00B0KM9T71                  |
| use ISIN code                     |                               |
|-------------------------------------------------------------------|
|                                                                   |
|-------------------------------------------------------------------|
| Situation previous to the triggering transaction                  |
|-------------------------------------------------------------------|
| Number of shares                  | Number of voting rights       |
|-----------------------------------+-------------------------------|
| 10,858,429                        | 10,858,429                    |
|-------------------------------------------------------------------|
|                                                                   |
|-------------------------------------------------------------------|
| Resulting situation after the triggering transaction              |
|-------------------------------------------------------------------|
| Number of shares    | Number of voting rights | Percentage of     |
|                     |                         | voting rights     |
|                     |-------------------------+-------------------|
|                     | Direct      | Indirect  | Direct | Indirect |
|---------------------+-------------+-----------+--------+----------|
| 10,961,917          | 3,105,415   | 7,856,502 | 2.551% | 6.453%   |
+-------------------------------------------------------------------+



+---------------------------------------------------------------------------+
|B:     Qualifying Financial Instruments                                    |
|---------------------------------------------------------------------------|
|Resulting situation after the triggering transaction                       |
|---------------------------------------------------------------------------|
|Type of   |Expiration|Exercise/  |No. of voting rights that may |Percentage|
|financial |date      |conversion |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 |
|-------------------------+-----------------------------|
|  10,961,917             | 9.003%                      |
+-------------------------------------------------------+



+-------------------------------------------------------------------+
| 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                 |
|                               |                                 |
+-----------------------------------------------------------------+

---END OF MESSAGE---




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Copyright  Hugin AS 2009. All rights reserved.