Holding(s) in Company

For filings with the FSA include the annex

For filings with issuer exclude the annex 

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 attached:

PORVAIR PLC

2. Reason for notification (yes/no)

An acquisition or disposal of voting rights

X

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 obligation:

GIORGIO GIRONDI

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

MERRILL LYNCH INTERNATIONAL

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

18 MAY 2009

6. Date on which issuer notified:

20 MAY 2009

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

BELOW 3% TO 22%

8: Notified Details

A: Voting rights attached to shares

Class/type of shares

If possible use ISIN code

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of shares

Number of voting rights

Number of shares Direct

Number of voting rights

Percentage of voting rights

Direct

Indirect

Direct

Indirect

ORD 2P

GB 0006963689

488,101

488,101

N/A

N/A

9,239,528

N/A

22%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ conversion period/date 

No. of voting rights that may be acquired (if the instrument exercised/converted)

Percentage of voting rights

N/A

Total (A+B)

Number of voting rights

Percentage of voting rights

9,239,528

22%

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:

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:

NONE

14 Contact name:

WILLIAM BELCHER

15. Contact telephone number:

020 7300 4221