Holding(s) in Company

HAMWORTHY PLC

16 JANUARY 2012

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:

Hamworthy plc

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 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 notification obligation:

Barclays Plc

4.

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

Barclays Capital Securities Ltd

Gerrard Investment Management Ltd

5.

Date of transaction (and date on which the threshold is crossed or reached if different):

13 January 2012

6.

Date on which issuer notified:

16 January 2012

7.

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

5%

8.

Notified Details

A:

Voting rights attached to shares

Class/type of shares

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

If possible use ISIN code

Number of shares

Number of voting rights

Number of shares

Number of voting rights

Percentage of voting rights

Direct

Direct

Indirect

Direct

Indirect

GB00B01VFV79

Below notifiable threshold

Below notifiable threshold

2,493,756

2,492,092

1,664

5.49%

0.00%

B:

Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type offinancialinstrument

Expirationdate

Exercise/conversionperiod/date

No. of voting rightsthat may be acquired(if the instrumentexercised/converted)

Percentage of votingrights

C:

Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type offinancialinstrument

Exerciseprice

Expirationdate

Exercise/conversionperiod/date

No. of voting rightsthat may be acquired(if the instrumentexercised/converted)

Percentage of votingrights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

2,493,756

5.49%

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 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:

Geoff Smith

15.

Contact telephone name:

020 7116 2913