OXFORD INSTRUMENTS PLC: Holding(s) in Company

For filings with the FSA include the annex                                      
                                                                           
For filings with issuer exclude the annex                                       
TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi                                 
1. Identity of the issuer or the underlying       Oxford Instruments plc       
issuer of existing shares to which voting                                      
rights are attached: ii                                                         
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                                                             
                                                                           
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 the     Legal & General Group Plc (Group) 
notification obligation: iii                                                    


                                                Legal & General Investment     
                                                    Management Limited         
                                                                               
                                                          (LGIM)               


                                                                           
4. Full name of shareholder(s) (if            Legal & General Group Plc (L&G)  
different from 3.):iv                                                           
                                                                           
5. Date of the transaction and date on               05 February 2013          
which the threshold is crossed or reached:                                     
v                                                                               
                                                                           
6. Date on which issuer notified:                    06 February 2013           
                                                                           
7. Threshold(s) that is/are crossed or               Group (Above 5%)          
reached: vi, vii                                                                


                                                      LGIM (Above 5%)          

8. Notified details:
A: Voting rights attached to shares viii, ix

Class/type of     Situation                Resulting situation after            

shares            previous                       the triggering                 
              to the triggering                   transaction                   
                 transaction                                                    

if possible                                                                     

using                   Number                 Number           % of voting     

the ISIN CODE  Number     of     Number          of               rights x      
                 of     Voting     of          voting                           
               Shares   Rights   shares        rights                           
                                                                                


 Direct xi     Indirect xii     Direct   Indirect                            


                                                                         
Ordinary 5p      Below 5%      2,852,830 1,758,616 1,094,214  3.09%    1.92%  


                                                                             
               (as at 05/02/                                                 
                   2013)                                                     

B: Qualifying Financial Instruments                                            


                                                                           
Resulting situation after the triggering transaction                            
Type of financial Expiration     Exercise/      Number of voting   % of voting  
instrument     date xiii  Conversion Period rights that may be    rights     


                                    xiv         acquired if the                
                                                 instrument is                 
                                                   exercised/                  
                                                   converted.                  
                                                                               

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


                                                                           
Resulting situation after the triggering transaction                            
Type of     Exercise Expiration Exercise/  Number of voting    % of voting   


    financial     price   date xvii  Conversion rights instrument rights xix, xx 

  instrument                          period       refers to                    
                                      xviii                                     
                                                                                
                                                                 Nominal  Delta 
                                                                                

Total (A+B+C)                                                                   
                                                                                
        Number of voting rights                Percentage of voting rights      
                                                                                
               2,852,830                                  5.01%                 
                                                                                

9. Chain of controlled undertakings through which the voting rights and/or the  

financial instruments are effectively held, if applicable: xxi                  
                                                                                

Legal & General Group Plc (Direct and Indirect) (Group)                         
                                                                                

(2,852,830-5.01%=Total Position)                                                
                                                                                

Legal & General Investment Management (Holdings) Limited (LGIMH) (Direct and    

Indirect) (2,852,830-5.01%=Total Position)                                      
                                                                                

Legal & General Investment Management Limited (Indirect) (LGIM)                 

(2,852,830-5.01%=Total Position)                                                
                                                                                

Legal & General Group Plc (Direct) (L&G) (1,758,616 - 3.09% = LGAS, LGPL & PMC) 
                                                                                

Legal & General Investment Management (Holdings) Limited (Direct) (LGIMHD)      

(PMC)                                                                           
                                                                                

Legal & General Insurance Holdings Limited (Direct) (LGIH)                      
                                                                                

Legal & General Assurance (Pensions Management) Limited (PMC) (PMC)             
                                                                                

Legal & General Assurance Society Limited (LGAS & LGPL)                         
                                                                                

Legal & General Pensions Limited (Direct) (LGPL)                                


Proxy Voting:                                                                  


                                                                           
10. Name of the 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:               Notification using the total voting   


                                                   rights figure of            
                                                                               
                                                      56,872,108               


                                                                           
14. Contact name:                                 Susan Johnson-Brett           
                                                                           
15. Contact telephone number:                        01865 393 200              
END 
-0- Feb/07/2013 09:33 GMT