Holding(s) in Company

TT electronics PLC
12 September 2007



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:                              

TT Electronics Plc


2. Reason for notification

An acquisition or disposal of voting rights
                                       

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

JPMorgan Chase & Co
                                        

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

JPMorgan Asset Management (UK) Limited
                                     

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

10 September 2007
                                       

6. Date on which issuer notified: 

11 September 2007
                              

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

5%


8: Notified Details

A: Voting rights attached to shares

Class/type of   Situation previous to    Resulting situation after the triggering
shares          the triggering           transaction
                transaction
If possible     Number of   Number of    Number of   Number of voting    Percentage of
use ISIN code   shares      voting       shares      rights              voting rights
                            rights
  
                                                     Direct   Indirect   Direct   Indirect

GB0008711763    7,812,387   7,812,387    7,211,293            7,211,293           4.654%


B: Financial Instruments

Resulting situation after the triggering transaction

Type of         Expiration date Exercise/       No. of voting    Percentage of
financial                       conversion      rights that may  voting rights
instrument                      period/date     be acquired (if
                                                the instrument
                                                exercised/
                                                converted)
N/A


Total (A+B)

Number of voting rights                Percentage of voting rights

7,211,293                              4.654%



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

Total disclosable holding for JPMorgan Chase & Co. : 7,211,293 (4.654%)

Holdings by controlled undertakings of JPMorgan Chase & Co. are as follows:

JPMorgan Asset Management (UK) Limited


Proxy Voting:

10. Name of proxy holder:              N/A

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

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



13. Additional information:            Please note the group has other
                                       holdings which are covered by
                                       exemptions.

14 Contact name:                       Tracey Young

15. Contact telephone name:            020 7325 4513



Name of authorised official of the issuer responsible for making this
notification:

W J Sharp
Group Company Secretary
TT electronics plc

Date of Notification: 12 September 2007



Annex: Notification of major interests in shares     

A: Identity of the persons or legal entity subject to the notification      
obligation                                                                   

Full name                               JPMorgan Chase & Co           
(including legal form of legal        
entities)                            

Contact address                         270 Park Avenue, New York, NY10017     
(registered office for legal entities)                                      

Phone number & email                    001 212 270 6000                      

Other useful information                N/A                                   
(at least legal representative for   
legal persons)                       


B: Identity of the notifier, if applicable                          

Full name                               Tracey Young                          

Contact address                         JPMorgan Chase Bank, N.A., 13th Floor,
                                        125 London Wall, London, EC2Y 5AJ     

Phone number & email                    020 7325 4513                        
                                        [e-mail]           

Other useful information                N/A                                   
(e.g. functional relationship with the
person or legal entity subject to the 
notification obligation)              


C: Additional information                                                    

N/A                                                                          




                      This information is provided by RNS
            The company news service from the London Stock Exchange