TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuer
of existing shares to which voting rights are
attached: ii

Filtronic PLC

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

No

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

No

An event changing the breakdown of voting rights

No

Other (please specify):

3. Full name of person(s) subject to the
notification obligation: iii

Gartmore Investment Limited

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

See Attached Schedule

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

30 April 2010

6. Date on which issuer notified:

4th May 2010

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

10%

8. Notified details:

A: Voting rights attached to shares viii, ix

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 x

Direct

Direct xi

Indirect xii

Direct

Indirect

Ordinary

3,760,851

3,760,851

6,827,967

6,827,967

9.187%

GB0003362992

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial
instrument

Expiration
date xiii

Exercise/
Conversion Period xiv

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

% of voting
rights

N/A

N/A

N/A

N/A

N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financial
instrument

Exercise price

Expiration date xvii

Exercise/
Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

CDF

N/A

N/A

N/A

800,000

Nominal

Delta

1.076%

N/A

Total (A+B+C)

Number of voting rights

Percentage of voting rights

7,627,967

10.263%

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

Proxy Voting:

10. Name of the 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:

All figures are based on the Company’s issued share capital of 74,323,093 as provided by Exshare

E mail contact RDU@Gardmore.com

14. Contact name:

RDU

15. Contact telephone number:

020 782 2324