Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

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

HAYNES PUBLISHING GROUP P.L.C.

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):

No

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

Miton Group plc

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

See section 9 below

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

01/03/2013

6. Date on which issuer notified:

04/03/2013

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

Was 6.42%, Now 10.34%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

GB 000 416 0833

392,105

392,105

632,105

n/a

632,105

n/a

10.34%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

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 financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

632,105

10.34%

Diverse Income Trust | HSBC Global Custody Nominees (UK) Ltd a/c 727563 | 263,158

CF Miton UK Multicap Income Fund | Bank of New York Nominees Ltd a/c 397449 | 128,947

Henderson Fledgling Trust | HSBC Global Custody Nominees (UK) Ltd a/c 724755 | 240,000

Proxy Voting:

10. Name of the proxy holder:

n/a

11. Number of voting rights proxy holder will ceaseto hold:

n/a

12. Date on which proxy holder will cease to holdvoting rights:

n/a

13. Additional information:

Miton Capital Partners Ltd and Miton Asset Management Ltd are both subsidiaries of Miton Group plc

14. Contact name:

Ian Borrows

15. Contact telephone number:

0151 906 2476