OXIG Oxford Instruments Plc

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                               X

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 Capital Group Companies, Inc.
the notification obligation: iii

4. Full name of shareholder(s) (if    See Section 9
different from 3.):iv

5. Date of the transaction and date   23 September 2013
on which the threshold is crossed or
reached: v

6. Date on which issuer notified:     24 September 2013

7. Threshold(s) that is/are crossed   Below 5%
or reached: vi, vii

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

Class/type   Situation previous            Resulting situation after
of            to the triggering                  the triggering
shares           transaction                      transaction


if possible             Number                  Number           % of voting
using         Number      of      Number          of              rights x
the ISIN        of      Voting      of          voting
CODE          Shares    Rights    shares        rights


                                 Indirect Direct xi Indirect   Direct  Indirect
                                                       xii

GB0006650450 2,860,081 2,860,081                    2,610,081          4.5838%

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

               2,610,081                                4.5838%

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

The Capital Group Companies, Inc. ("CG") holdings - 2,610,081 - 4.584%

Holdings by CG Management Companies and Funds:

  * Capital Research and Management Company - 2,610,081 - 4.584%

- SMALLCAP World Fund, Inc.

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:                     Oxford Instruments plc

14. Contact name:                                 Susan Johnson-Brett

15. Contact telephone number:                        01865 393 324