Holding(s) in Company

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Allergy Therapeutics 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 : Increase in total voting rights issued by the Company

X

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

FIL Limited

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

FISL

JP Morgan, Bournemouth nominee

FIL Limited is the parent holding company for various direct and indirect subsidiaries including FIL Fund Management Limited, FIL Investment Services Limited, FIL Gestion, FIL Asset Management (Korea) Limited FIL Investment Management (Hong Kong) Limited, FIL Pension Management, Fidelity Investments Japan and FIL Investments International, investment managers for various non-US investment companies and institutional clients

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

24 March 2010

6. Date on which issuer notified:

25 March 2010

7. Threshold(s) that is/are crossed or reached:  Above 5%

8. Notified details

A: Voting rights attached to shares

Class/type of shares

if possible using the ISIN CODE

Situation previous to the Triggering transaction

Resulting situation after the triggering transaction

Number of Voting Rights

Number of shares

Number of voting rights

% of voting rights

Direct

Indirect

Direct

Indirect

GB00B02LCQ05

15,117,776 15,117,776

15,117,776

15,117,776

4.88%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ Conversion Period/ Date

Number of voting rights that may be acquired if the instrument is exercised/ converted

% of voting rights

N/A

N/A

N/A

N/A

N/A

Total (A+B)

Number of voting rights

% of voting rights

15,117,776

4.88%

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

See 4 above

Proxy Voting:

10. Name of the proxy holder:

FIL Limited

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

N/A

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

N/A

13. Additional information:

Increase in total voting rights issued by the company

14. Contact name

Amanda Chana

15. Contact telephone number

[email protected]