Avation Regulatory News (AVAP)

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

AVATION PLC

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

√

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):

Pursuant to the placing completed on 30 March 2011

√

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

Robert Jeffries Chatfield

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

Not Applicable

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

30 March 2011

6. Date on which issuer notified:

30 March 2011

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

Above 5%

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

Ordinary shares

6,713,211

6,713,211

1

1

6,863,210

0.0000026%

17.81%

GB00B196F554

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

Not Applicable

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

Not Applicable

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

6,863,211

17.81%

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

The 150,000 shares were acquired by Epsom Assets Ltd, a company in which Mr Chatfield, a director and Chairman of Avation PLC has a beneficial interest.

Proxy Voting:

10. Name of the proxy holder:

Not Applicable

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

Not Applicable

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

Not Applicable

13. Additional information:

Not Applicable

14. Contact name:

Mr Peter Freeman

Ms Siobhan Cool/Ms Carissa Gina Tan*

15. Contact telephone number:

+44(0) 207 6281128

+65 6252 2077*

Note: Annex should only be submitted to the FSA not the issuer

Annex: Notification of major interests in share

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

Full name

(including legal form of legal entities)

Robert Jeffries Chatfield

Contact address

(registered office for legal entities)

c/o 510 Thomson Road #12-04

SLF Building

Singapore 298135

Phone number & email

+44 7783 942 553

Other useful information

(at least legal representative for legal persons)

Not Applicable

B: Identity of the notifier, if applicable

Full name

Ms Siobhan Cool/Ms Carissa Gina Tan

Contact address

510 Thomson Road #12-04

SLF Building

Singapore 298135

Phone number & email

+65 6252 2077

Siobhan Cool - cool@advent.com.sg

Carissa Gina Tan - carissa.tan@advent.com.sg

Other useful information

(e.g. functional relationship with the person or legal entity subject to the notification obligation)

Siobhan Cool - Group Legal Counsel

Carissa Gina Tan - Company Secretary

C: Additional information

Not Applicable

For notes on how to complete form TR-1 please see the FSA website.