Holding(s) in Company

Smiths Group PLC
17 March 2008

Form TR-1 with annex. FSA Version 2.1 updated April 2007


TR-1: Notifications of Major Interests in Shares


1. Identity of the issuer or the underlying issuer of                    Smiths Group plc
existing 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 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    Massachusetts Financial Services Company.
obligation:

4. Full name of shareholder(s) (if different from    MFS invests in securities of the issuer on
3):                                                  behalf of its various mutual funds and
                                                     institutional account clients.

5. Date of transaction (and date on which the
threshold is crossed or reached if different):       12-03-08

6. Date on which issuer notified:                    17-03-08

7. Threshold(s) that is/are crossed or reached:      4.92% as of 12 March 2008

8: Notified Details                                         Please note that MFS qualifies under
                                                            DTR 5.1.5 R(d) as a US-registered investment manager.
A: Voting rights attached to shares

Class/type of     Situation previous to the   Resulting situation after the triggering transaction
shares            triggering transaction
                  Number of     Number of     Number of    Number of voting rights Percentage of voting
If possible use   shares        voting rights shares                               rights
ISIN code

                                                           Direct      Indirect    Direct       Indirect
ORD -
GB00B1WY2338      28,325,081    28,325,081                             19,079,106               4.92%                   


B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial    Expiration date      Exercise/ conversion No. of voting rights that Percentage of
instrument                                period/date          may be acquired (if the   voting rights
                                                               instrument exercised/
                                                               converted)


Total (A+B)

Number of voting rights                              Percentage of voting rights
19,079,106                                                            4.92%

9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively
held, if applicable:

Smiths Group PLC - B1WY233
Holdings as of 12 March 2008

Entity                                                        Holding            Percentage Held
MFS Investment Management (MFS)                               6,219,455          1.60%
MFS Institutional Advisors, Inc. (MFSI)                       4,941,269          1.27%
MFS International Ltd. (MIL)                                  256,331            0.07%
MFS International (U.K.) Limited (MIL U.K.)                   4,509,698          1.16%
MFS International Management K.K. (MIM K.K.)                  1,148,404          0.30%
MFS Investment Management (Lux) S.A. (MIM Lux)                1,957,587          0.50%
MFS Heritage Trust Company (MFSHE)                            46,362             0.01%
Notifiable Interest                                           19,079,106         4.92%
Shares Outstanding                                            387,806,828

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:

15. Contact telephone name:






                      This information is provided by RNS
            The company news service from the London Stock Exchange