Holding(s) in Company

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 attached:

Smiths Group plc

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

X

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 the notification obligation:

 Prudential plc group of companies

4. Full name of shareholder(s) (if different from 3.):

See attached schedule

5. Date of the transaction and date on which the threshold is crossed or reached:

 09 June 2010

6. Date on which issuer notified:

 10 June 2010

7. Threshold(s) that is/are crossed or reached:

 5%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

 GB00B1WY2338

Below 5%

Below 5%

19,584,651

19,584,651

0

5.01

0

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ Conversion Period

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date

Exercise/ Conversion period

Number of voting rights instrument refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

19,584,651

5.01%

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

Prudential plc (parent Company)

Proxy Voting:

10. Name of the proxy holder:

 N/A

11. Number of voting rights proxy holder will cease to hold:

 N/A

12. Date on which proxy holder will cease to hold voting rights:

 N/A

13. Additional information:

14. Contact name:

Dipesh Varsani / Mark Thomas

M&G Investment Management Limited

15. Contact telephone number:

 020 7548 3261 / 020 7548 3266

Registered holder

Holding

Voting rights

% Voting rights

Prudential plc

19,584,651

5.01

Total notifiable interest

NORTRUST NOMINEE LTD A/C MNJ01

211,929

211,929

PRUCLT HSBC GIS NOM (UK) PPL AC

1,399,800

1,399,800

NORTRUST NOMS LTD A/C PUR01

1,380,840

1,380,840

NORTRUST NOMINEE LTD A/C MKD01

325,000

325,000

NORTRUST NOMINEES LTD A/C MHA01

160,000

160,000

BK OF NEW YORK (NOMS) LTD / 636928

91,772

91,772

NORTRUST NOMS LTD

435,257

435,257

NORTRUST NOMS LTD A/C PUP01

93,502

93,502

JP MORGAN NOMINEES

210,067

210,067

NORTRUST NOMS LTD A/C PUC01

56,316

56,316

NORTRUST NOMINEE LTD A/C MHJ01

516,362

516,362

NORTRUST NOMS LTD A/C PUS01

15,248

15,248

NORTRUST NOMINEE LTD A/C MXB01

29,932

29,932

PRUCLT HSBC GIS (UK) PAC AC

6,315,602

6,315,602

NORTRUST NOMS LTD A/C PUI01

11,120

11,120

NORTRUST NOMINEE LTD A/C MKB01

110,819

110,819

NORTRUST NOMINEE LTD A/C MHB01

200,000

200,000

NORTRUST NOMINEE LTD A/C MKK01

7,100,000

7,100,000

NORTRUST NOMINEE LTD A/C MNB01

669,237

669,237

NORTRUST NOMS LTD A/C PUB01

1,551

1,551

NORTRUST NOMS LTD A/C MVB01

68,175

68,175

NORTRUST NOMINEE LTD A/C MHF01

85,820

85,820

NORTRUST NOMS LTD A/C MVA01

96,302

96,302