Holding(s) in Company

Financial Services Authority

+------------------------------------------------------------------------------+
|TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES                                |
+------------------------------------------------------------------------------+

+----------------------------------------------+-------------------------------+
|1. Identity of the issuer or the underlying   |                               |
|issuer                                        |                               |
|of existing shares to which voting rights are |        Weir Group Plc         |
|attached:                                     |                               |
|                                              |                               |
+----------------------------------------------+-------------------------------+
|2. Reason for the notification (please tick the appropriate box or boxes):    |
+---------------------------------------------------------------------+--------+
|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 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):                                              |        |
|                                                                     |        |
+--------------------------------------+------------------------------+--------+
|3. Full name of person(s) subject to  |   Legal & General Group Plc (Group)   |
|the                                   |                                       |
|notification obligation:              | Legal & General Investment Management |
|                                      |            Limited (LGIM)             |
+--------------------------------------+---------------------------------------+
|                                      |                                       |
|4. Full name of shareholder(s)        |    Legal & General Group Plc (L&G)    |
|(if different from 3.):               |                                       |
|                                      |                                       |
+--------------------------------------+---------------------------------------+
|                                      |                                       |
|5. Date of the transaction and date on|                                       |
|which the threshold is crossed or     |             31 March 2011             |
|reached:                              |                                       |
|                                      |                                       |
+--------------------------------------+---------------------------------------+
|6. Date on which issuer notified:     |             01 April 2011             |
+--------------------------------------+---------------------------------------+
|7. Threshold(s) that is/are crossed or|           Group (Below 5%)            |
|reached:                              |                                       |
|                                      |            LGIM (Below 5%)            |
+--------------------------------------+---------------------------------------+

+------------------------------------------------------------------------------+
|8. Notified details:                                                          |
|                                                                              |
+------------------------------------------------------------------------------+
|A: Voting rights attached to shares                                           |
+------------+---------------+-------------------------------------------------+
|Class/type  |   Situation   |    Resulting situation after the triggering     |
|of          |   previous    |                   transaction                   |
|shares      |    to the     |                                                 |
|            |  triggering   |                                                 |
|if possible |  transaction  |                                                 |
|using       +------+--------+---------+----------------------+----------------+
|the ISIN    |Number| Number |         |   Number of voting   |  % of  voting  |
|CODE        |  of  |   of   | Number  |        rights        |     rights     |
|            |  ares| Vot ng |of shar  +-----------+----------+------+---------+
|            |      | Rights |         |  Direct   | Indirect |Direct|Indirect |
+------------+------+--------+---------+-----------+----------+------+---------+
|            |   10,612,532  |                                                 |
|Ordinary    |               |                    Below 5%                     |
|12.5p       |     As of     |                                                 |
|            |  22/11/2010   |                                                 |
+------------+---------------+-------------------------------------------------+

+------------------------------------------------------------------------------+
|B: Qualifying Financial Instruments                                           |
+------------------------------------------------------------------------------+
|Resulting situation after the triggering transaction                          |
+--------------+------------+---------------------+------------+---------------+
|              |            |                     |Number of   |               |
|Type of       |Expiration  |Exercise/            |voting      |% of voting    |
|financial     |date        |Conversion Period    |rights that |rights         |
|instrument    |            |                     |may be      |               |
|              |            |                     |acquired if |               |
|              |            |                     |the         |               |
|              |            |                     |instrument  |               |
|              |            |                     |is          |               |
|              |            |                     |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             |
+-------------------------------------+----------------------------------------+
|              10,520,243             |                 4.99%                  |
+-------------------------------------+----------------------------------------+

+------------------------------------------------------------------------------+
|9. Chain of controlled undertakings through which the voting rights and/or the|
|financial instruments are effectively held, if applicable:                    |
+------------------------------------------------------------------------------+
|                                                                              |
|Legal & General Group Plc (Direct and Indirect) (Group) (                     |
|10,520,243 -4.99% = Total Position)                                           |
|                                                                              |
|Legal & General Investment Management (Holdings) Limited                      |
|(LGIMH) (Direct and Indirect)  ( 10,520,243 -4.99% = Total                    |
|Position)                                                                     |
|                                                                              |
|Legal & General Investment Management Limited (Indirect) (LGIM)               |
|( 10,520,243 -4.99% = Total Position)                                         |
|                                                                              |
|  Legal & General Group Plc (Direct) (L&G) ( 8,815,964 -4.18% = LGAS, LGPL &  |
|                                     PMC)                                     |
|                                                                              |
|Legal & General Investment Management Legal & General Insurance Holdings      |
|(Holdings) Limited (Direct) (LGIMHD)  Limited (Direct) (LGIH)                 |
|(PMC)                                                                         |
|                                                                              |
|Legal & General Assurance (Pensions   Legal & General Assurance Society       |
|Management) Limited  (PMC) (PMC)      Limited  (LGAS & LGPL)                  |
|                                                                              |
|                                      Legal & General Pensions Limited        |
|                                      (Direct)  (LGPL)                        |
|                                                                              |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Proxy Voting:                                                                 |
+------------------------------------------------+-----------------------------+
|10. Name of the proxy holder:                   |             N/A             |
+------------------------------------------------+-----------------------------+
|11. Number of voting rights proxy holder will   |             N/A             |
|cease                                           |                             |
|to hold:                                        |                             |
+------------------------------------------------+-----------------------------+
|12. Date on which proxy holder will cease to    |             N/A             |
|hold                                            |                             |
|voting rights:                                  |                             |
+------------------------------------------------+-----------------------------+

+-----------------------------+------------------------------------------------+
|                             |   Notification using the total voting rights   |
|13. Additional information:  |             figure of  210,759,938             |
+-----------------------------+------------------------------------------------+
|14. Contact name:            |                Paul Toon (LGIM)                |
+-----------------------------+------------------------------------------------+
|15. Contact telephone number:|                 020 3124 3854                  |
+-----------------------------+------------------------------------------------+







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Source: The Weir Group PLC via Thomson Reuters ONE

[HUG#1502844]