Holding(s) in Company

Zytronic PLC
09 February 2007


TR-1:           NOTIFICATION OF MAJOR INTERESTS IN SHARES 


1. Identity of the issuer or the underlying issuer of existing   Montanaro Investment Managers Limited
shares to which voting rights are attached:

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 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 the notification            Montanaro Investment Managers Limited
   obligation:

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

5. Date of the transaction and date on which the threshold is    7 February 2007
   crossed or reached:

6. Date on which issuer notified:                                8 February 2007

7. Threshold(s) that is/are crossed or reached:                  Above 3%





8. Notified details:


A: Voting rights attached to shares
Class/type of       Situation previous to  Resulting situation after the triggering transaction
shares              the Triggering
                    transaction
 if possible using  Number of  Number of   Number of       Number of voting rights  % of voting rights
the ISIN CODE       Shares     Voting      shares
                               Rights      Direct          Direct      Indirect     Direct      Indirect
GB0006971013        418,582    418,582     538,582         538,582                   538,582

1p Ords


B: Financial Instruments
Resulting situation after the triggering transaction
Type of financial    Expiration date Exercise/ Conversion      Number of voting rights    % of voting
instrument                           Period/ Date              that may be acquired if    rights
                                                               the instrument is
                                                               exercised/ converted.
        N/A


Total (A+B)
Number of voting rights                            % of voting rights
     538,582








9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively
held, if applicable:
Montanaro Investment Managers Limited - 538,582 shares - 3.678%


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:
14. Contact name:                                 Denis Mullan, Zytronic
15. Contact telephone number:                     0191 414 5511




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